We can customize the length whatever you want, pls contact us before buying. Material :Bearing Steel and aluminum alloy, Minimum starting torque, able to apply high speed and micro-feeding Ball screw Kits for CNC High stiffness and accuracy. Specifications:Model: SFU1605Precision: C7 GradeLength: 1500mm(59inch)Diameter: 16mm(0., 62inch)Pitch: 5mmProduct name: BK12+BF12 Ball Screw End SupportMaterial: Carbon steelColor: silver, as picture showsPackage Included :1 x End Machine SFU1605-1500MM;1 Set BK12/BF12;1 x BR 6., 35mm x 10mm Shaft Coupler;1 x DSG16H Ball nut HousingThe material is made by the high quality steel and case hardened。Very high load carrying capacity. 16mm (SFU1605) Ball Screw Kit - RM Aluminium and Fasteners CHUANGNENG Ball Screw CNC Parts SFU1605 RM1605 16mm 1500mm with Metal Deflector Ball Screw nut BK/BF12 End Supports Ball NUT HOUSINGS 1pcs Coupler with end Machining,Length Approx 59inch/1500mm Smooth and ultra quiet bearings for rails. Compact design and easy to mount and dismount. high service life time due to low friction; low operation noise Ball Screw Assembly CHUANGNENG Ball Screw CNC Parts SFU1605 RM1605 16mm 1500mm With Metal Deflector Ball Screw Nut BK/BF12 End Supports Ball NUT HOUSINGS 1pcs Coupler With End Machining,Length Approx 59inch/1500mm BK12 BF12 End Supports The ballscrews apply for electronic machinery robot, measuring instruments, medical equipment, X-Y table, factory automation equipment, etc.