BQLZR Lead Screw Linear Rail Optical Axis 500x8mm Kit w/ Mount Support SK8 Pack of 15

Feature: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information; 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed. 3.The item contains 1 piece Lead Screw with Nut 500x8mm, 2 pcs Bearing Block Mounted Support, 2 pcs Flexible Coupling, 2 pcs Optical Axis 500x8mm, 4 pcs Linear Rail Optical Axis Support SK8, 4 pcs Linear Ball Bearing, total 15 pcs products. 4.Mainly used in stepper motors, machine tool guides, 3D printers and other equipment. 5.Mainly made of stainless steel, bearing steel, good wear resistance, high precision and good strength. 6.A complete set of accessories for quick installation, saving your time. Specification: Material: Stainless steel, bearing steel, copper Color: Silver, Black, Copper Brand name: BQLZR Size: Lead Screw: 500x8mm/19.69 x 0.31inch(L x Dia) Nut: 22mm/0.87inch(Dia) Bearing Block Mounted Support Inner Hole: 8mm/0.31inch Flexible Coupling: Hole Dia: 5 x 8mm/0.19 x 0.31inch 19 x 25mm/0.75 x 0.98inch(Dia x H) Optical Axis: 500x8mm/19.69 x 0.31inch(L x Dia) Linear Rail Optical Axis Support SK8 Hole Dia: 8mm/0.31inch Linear Ball Bearing Inner Dia: 8mm/0.31inch Weight:972g Package Include: 1 x Lead Screw with Nut 500x8mm 2 x Bearing Block Mounted Support 2 x Flexible Coupling 2 x Optical Axis 500x8mm 4 x Linear Rail Optical Axis Support SK8 4 x Linear Ball Bearing