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. Dual rail screw rod set includes 1 lead screw rod, 2 rail shaft support, 2 flexible shaft coupling, 2 optical axis, 4 linear slide block and 4 pillow block bearing. 4. This product has good strength, high precision, durable, sturdy and wear-resistant. 5. Wide application: mainly used in stepper motors, machine tool guide rails and 3D printers and other equipment. .
eBay