Please be kindly noted，the listed product is produced and distributed abroad and subject to the laws of its country of origin。    Features:  1.No installation, no adjustment, ready to use after unpacking.  2.The diameter can be adjusted in 8 steps, and the engraving diameter can be as small as 4mm.  3.Roller protruding design, no obstruction, unlimited length of engraved objects.  4.Compatible with ATOMSTACK, NEJE, Ortur,Twotrees,etc. and applicable to 95% of engraving machines on the market.  5.Concentric design, adjustment-free timing belt,and the motor is not exposed, safer.  6.Engraving: longer cylinders, small diameter cylinders, over-length plate engraving, over-length plate cutting.      Specifications:  Material: Aluminum Alloy,303 Stainless Steel, Iron, Silicone,Plastic  Power: 24W  Item Size: 260 * 90 * 100mm / 10.2 * 3.5 * 3.9in  Item Weight: 1.04KG / 2.3lbs  Package Size: 29 * 19 * 13cm / 11.4 * 7.5 * 5.1in  Package Weight: 1.586KG / 3.5lbs    Packing List:  1 * Roller Axis of Rotation   4 * Auxiliary Heightening Columns