10PCS 3D Printer U Wheel Pulley Bearing 4 x 13 x 4mm U Pulley Rail Ball Bearing 1mm Deep Metal Silver U Ball Bearings Pulley Wheels Roller Bearing for 3D Printer Extruder
【Reliable Product】It is the U- Wheel Pulley Bearing,made of High quality metal material,with the feature of wearable, and long lasting,helping you complete work without anxiety
【Good Performance】With feature of High precision, smooth, low noiseKeep a quiet environment ,used for 3D printer
【Cost-effective replacement】Total 10pcs in one pack,economical replacement for money saving,Great replacement parts extruder accessories for 3D printer to replace your broken one
【Basic Parameters】with 4mm Inner Diameter and 4mm Thickness,13mm Outer Diameter 1mm Depth,2.1mm Width,Please order it by your needs
【Sale Warranty】If you have any question about the products,please contact us in time.we own 24-hour professional Customer service to answer any questions for you.we will help you satisfy solve it,and support all refund if there is some defect