Features: brand new and high quality Aluminum Alloy: Made of aluminum alloy, this heightening column is a perfect accessories to the laser engraving machine, will not deform or shake. Can be Joined Together: The height of a single column is 50mm, which can be spliced for head to tail to support the height you want, convenient for your work. Cylinder Design: Cylinder heightening parts, more uniform force, flat appearance without edges and corners, will not hurt your hands. Package Includes: 8 heightening column, 4 nuts and 4 rubber pads. Necessary accessories for better performance. Scope of Application: This heightening column can be used with Y axis wheel engraving module for laser shaft engraving rotary roller machine, laser engraving machine. Package Includes: 8 x Laser Engraving Machine Heightening Column 4 x Nut 4 x Rubber Pad Specifications: Item Type: Engraving Machine Heightening Column Material: Aluminum Alloy Size: Height: approx. 50mm/2in OD: approx. 20mm/0.8in note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you