Fangrui Product Details New And High Quality Application Made Of Premium Aluminum Alloy Material,high Hardness, Wear Resistance, Rust Resistance, Durability, Long Service Life. Excellent Material, Compact Structure And Suitable Size, For Machining Projects. Installation And Use Is Very Simple, There Is No Complicated And Difficult Place To Understand,a Great Of The Broken One. Mainly Used For Blocking The Headstock And Tailstock,it Is An Accessory That Is Often Used During Machining And Can Provides Convenience In The Machinery Project Specification: Model : Z030mb Weight: 88 G / 3.1 Oz(.) Colour:black Material:aluminum Alloy Size:about 50*50*50mm Package Contents: 1 * Riser Block Only The Above Package Content, Other Products Are Not Included. Note: Light And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.