Features: Made of aluminum-alloy, this heightening column is a perfect accessories to the 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 heightening parts-, more uniform force, flat appearance without edges and corners, will not hurt your hands. 12pcs heightening columns- set,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, engraving machine. Specifications: Size: approx 50mm/1.97in Material:Aluminum-alloy Applicable to: Laser-engraving machine Color:Black Material:metal Quantity:12Pcs/Set Note: 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! Package includes: 1 Set Laser-Engraving Lifter