Features 1、Applicable model: Applicable for Ortur Laser Master 3 only. 2、Easily Expand the Engraving Area: just replace the frame shaft of the laser engraving machine, you can get a large engraving area of 400x850mm. 3、High Accuracy and Stability: With the structural design of steel wheel and synchronous Belt, it is stable and accurate even at a working speed of 200mm/s and a large area. 4、Higher Working Efficiency: The large working area allows you to set more quantity at one time to achieve higher working efficiency. 5、Applicable rectangular objects: Engrave and cut longer objects such as skateboards, doors, tables, long drawing boards, etc. Specification Features: Applicable model: Applicable for Ortur Laser Master 3 only. Easily Expand the Engraving Area: just replace the frame shaft of the laser engraving machine, you can get a large engraving area of 400x850mm. High Accuracy and Stability: With the structural design of steel wheel and synchronous Belt, it is stable and accurate even at a working speed of 200mm/s and a large area. Higher Working Efficiency: The large working area allows you to set more quantity at one time to achieve higher working efficiency. Applicable rectangular objects: Engrave and cut longer objects such as skateboards, doors, tables, long drawing boards, etc. Specification: Color: Grey Product Weight: 1.62kg Frame Material: 6063-T5 Package Size: 105x13x7cm/4.1x5.1x2.7in Package Weight: 2kg/70.5oz Packing List: 1 x Extension Kit Package List 1 x Extension Kit