Features 1、▶ Application: Suitable for L3/L6/JL3/JL4/JL7/Z2/Z3/Z4 laser engravers. 2、▶ Max engraving objects Length up to 370mm, and support diameter of 390mm. 3、▶ Made of Aluminum Alloy structure, the hardness the friction force is stronger, and the engraving process is more stable. 4、▶ Perfect for Engraving Cylindrical Objects - It/u0027s suitable for engraving cans, wine bottles, cups, curved crafts, and more. 5、▶ Easy to operate: no need to install, connect the rotary roller with the engraver as soon as out of the box. Specification Features: ▶ Application: Suitable for L3/L6/JL3/JL4/JL7/Z2/Z3/Z4 laser engravers. ▶ Max engraving objects Length up to 370mm, and support diameter of 390mm. ▶ Made of Aluminum Alloy structure, the hardness the friction force is stronger, and the engraving process is more stable. ▶ Perfect for Engraving Cylindrical Objects - It's suitable for engraving cans, wine bottles, cups, curved crafts, and more. ▶ Easy to operate: no need to install, connect the rotary roller with the engraver as soon as out of the box. Specification: Max Length: 370mm Max Diameter: 390mm Package Size: 26.2x10.6x3.3cm/10.3x4.1x1.2in Package Weight: 0.56kg/19.7oz Packing List: 1 x Rotary Roller Package List 1 x Rotary Roller