Product Description: Advantages: 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.It fit for various types of electronic equipment / guide rod, drive shaft and prop4. This set includes Optical Axis & Lead Screw, Pillow Block Bearing,Linear Rail Support,CNC Stepper Coupler and Ball Bearing5.Good wear resistance and strength, high accuracy, hard to rust.6.Has good performances, low friction coefficients and long usage spans. Specification:Color:Silver & greyWeight:639gAccessory:2 pcs x 8x200mm steel Optical Axis2 pcs x 55x13x30mm Zinc Alloy Pillow Block Bearing4 pcs x 42x32x11mm Aluminum Rail Shaft Support1 pcs x 200x8mm Stainless Steel Lead Screw Rod with Nut4 pcs x 8x34.5mm Slide Bushing2 pcs x 5x8mm D19L25 Flexible Shaft Coupling Package include:A Set of T8 Horizontal Lead Screw Rod Shaft Support(15pcs)Q:How can I know more details of each Accessory? A:Welcome to visit our shop to see the related items with corresponding keywords.