30mm Diameter Linear Ball Bearings for 3D Printer Feature:1. Ball bearings: this bearing is an indispensable part for linear motion, which enables smoother movement and high efficiency.2. Reliable operation: these seals on both sides provide less friction, higher accuracy and low noise when operating at high speeds.3. Better Design: 6 rows of steel ball form a complete closed loop for greater stability. It has a bore of 30mm, an outer diameter of 45mm and a length of 64mm.4. Wide tool: can be widely used for 3D printers, cnc, linear guides, electronics, modules or units with linear motion.5. Good Material: Made of high-quality steel bearing for better rigidity and durability against wear and long-term use. Specification:Item Type: Linear BearingsProduct Model Number: LM30UUM Product Material: Bearing Steel Bore: Approx. 30mm/1.18in Diameter: Approx. 45mm/1.77in Length: Approx. 64mm/2.52in Package List:2 x Linear Bearings Usage:Install and use it directly. 1) we accept Alipay, West Union, TT. All major credit cards are accepted through the payment processor's secure escrow. 2) Payment must be made within 3 days of placing the order. 3) If you can't check out immediately after the auction ends, please wait a few minutes and try again, payments should be completed within 3 days. About Shipping 1.