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Longer LK1 PRO

Auto Bed-Leveling

3D Printer

Main Features:

300 x 300 x 400mm printing size
4.3-inch large color touch screen, know the printing status and parameters at a glance
● Brand-new smartphone style UI design, better user experience, more sense of technology
● Displays printing status through the color-changing breath lights, standby: flash green, red: heating, printing: blue

Matrix auto-leveling, detects the hotbed is completely horizontal or not by testing 16 points on it, advanced automated setting up
● More successful in 3D printing with filament run-out protection
TMC ultra-quiet drive, effectively reduce the printing noise, no annoying buzzing
Dual Z axis rods and motors, providing more powerful and stable printing

● High-speed turbo fan cooling, can withstand long-time printing of complex models
Big hand-screw nuts for more convenient to manual leveling
● Efficient heating and uniform temperature provided by the high-power hotbed with aluminium substrate, glass build platform and PC sticker
● Simple and integrated wiring, say goodbye to messy wires

Please click here to download the open source code of Marlin

Printing size: 300 x 300 x 400mm
Platform material: 3mm integral heated aluminium substrate, high temperature resistant PC film
Platform temperature: 50 - 100 Celsius degree
Filament: 1.75mm PLA, ABS

Longer LK1 Pro PDF


Brand: Longer 3D 
Model: LK1 Pro 
Type: Complete Machine 
Material (Frames): Metal 
Platform board: Aluminum Alloy 
Nozzle quantity: Single 
Nozzle diameter: 0.4mm 
Nozzle temperature: 190 -220 Degree Celsius 
Layer thickness: 0.1-0.4mm 
Memory card offline print: TF card 
LCD Screen: Yes 
Print speed: 50mm / s 
Supporting material: ABS,PLA 
Material diameter: 1.75mm 
Language: Chinese,English 
File format: G-code,OBJ,STL 
Model supporting function: Yes 
XY-axis positioning accuracy: 0.0125mm 
Z-axis positioning accuracy: 0.0025mm 
Voltage: 110V/220V 
Working Power: 24V 
Host computer software: Cura 
Packing Type: Assembled packing 
System support: Windows, Linux, MAC 
Connector Type: USB

Dimensions and Weight

Product weight: 12.8000 kg 

Package weight: 16.6000 kg 

Product size (L x W x H): 38.20 x 38.20 x 41.00 cm / 15.04 x 15.04 x 16.14 inches 

Package size (L x W x H): 69.20 x 51.20 x 30.20 cm / 27.24 x 20.16 x 11.89 inches

Packing Contents:
1 x Printer Frame
1 x Printer Mainframe
1 x Filament
1 x Filament Holder
1 x Bag of Cable Ties,
1 x Trowel
1 x Pointed Nose Shear Forceps
1 x Wrench Bag
1 x Slotted Screwdriver
1 x Card Reader
1 x SD Card
1 x Open End Wrench
1 x Power Cord
1 x Data Cable
1 x Needle
2 x Auto-leveling Height Auxiliary Plate
1 x 16 M5 Screws
1 x 20 M5 Screws

Order Confirmation:

As soon as you place your order, you will receive an order confirmation e-mail.  This means that we have received your order in our system and pre-authorized your credit card for the purchase.  As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment.  If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail.  If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

Order Shipment:

If your order is stock and we process the charges to your credit card, it will ship within five business days from the date of your order.  We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at

*For products that are imported from Chinese manufacturers directly for the sale, the customer is responsibe for any and all customs fees, duties, and tariffs that may be incured.  No tariffs will apply to any products, including Chinese manufacturered, that are shipped from the USA.  Please contact us at info@project3dprinters to clarify from where a product will be shipping.


Please inspect the packaging of your item(s) when they arrive, if you notice any damage you should make note of it when signing for delivery.  If your item(s) do arrived damaged, please send photos to and we will process an insurance claim on your behalf.

Cancellations & Refunds:

All orders cancelled after 48 hours are subject to a $20 administration fee, whether or not your order has shipped.  If you order has shipped, you (the buyer) will also be responsible for actual return shipping charges. Refunds will only be issued to the original credit card that you use when placing your order.  All returns are subject to a 20% restocking fee.

We work very hard to ensure that we offer the absolute best prices online.  If you find another online store that offers a lower price than us within six months of your purchase date please let us know and we will refund your original payment for the difference.  We want you to feel confident that you are getting the absolute best price for the product you are ordering.  If you find that our own website has a lower price for the same item you have ordered within six months of your purchase date will refund the difference as well.

To request your partial refund simply e-mail us a link to the same product on our website, or on our competitors website within six months from the date of your order and we will process the credit accordingly.

Our 100% Price Guarantee has some limitations:

  • You must purchase the item from our website before requesting your Price Match Guarantee
  • Promotions such as rebates and buy one, get one free offers are not eligible
  • The item must be in stock on the competitors website
  • The competitor must be an online store, they may not have a retail location
  • The website can not be a discounter or auction website (ie; eBay, overstock, etc..)
  • The competitor must be an Authorized Retailer of the product in question
  • The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax

At Project 3D Printers, we take great pride in servicing our customers to the best of our abilities.  No customer, nor purchase, is too big or too small.  We pride ourselves in getting to know our customers on a personal level so that we can help you find exactly what you need for a price that you can afford. 

No, we're not Amazon, and we don't claim to be.  We may not be able to get your product tomorrow or the next day, but we can do something that Amazon cannot.....which is answer your questions and get you the support needed if and when you're having a problem. 

We will always answer your questions, return your calls, and return your emails.  If we don't have the answers we'll get them from the manufacturer.  You'll never be left alone.  We stand by our high-quality products.

Core Values:

Project 3D Printers takes great pride in living up to its core values:

1) Customer Service

2) Honesty

3) Reliability

4) Efficiency

We believe that the customer and his or her needs come first.  We'll do all that we can make our customers fulfill their needs and make them happy with their purchases.  We pride ourselves on our support system.  If we don't have the answers we will not rest until we find them.  

We know that things will sometimes go wrong.  Let's not kid ourselves.  It's unfortunate when they do, but we promise to be honest about the error and do all that we can to make it right.  We're value your patronage.  We hope that you have a great experience purchasing from us and will spread the word!

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