Item Type: Linear Guide Rail with Block Material: Stainless steel, ABS Product Model: MGN12C Product length: Approx. 31cm/12.2in Package List 1 x Linear Guide Rail with Block 12 x Screw 12 x Nut 1Stable Performance: The performance of our linear slider rail is stable. After continuous polishing and perfecting, we finally researched the most reasonable performance to bring you a great experience. 2Sturdy and Practical: This adapter is made of ABS and stainless steel material, superb craftsmanship, sturdy and practical, and can be suitable for a long term under the correct operation. 3Better Efficiency: The robust housing and powerful operation give this set the ability to provide more efficiency and make the work process easier. 4Security in Usage: Enhances security in usage, can withstand greater work strength, improves performance, allows for an enhanced experience in usage. 5Applicable Scene: This linear slider rail block set is applied for BGM direct extruder. If you have related needs, this set is suitable for you.