10pcs U624ZZ U groove ball bearing guide pulley for rail track linear 4*13*7mm

Features: 100% Brand New and High Quality These bearings are made from high quality carbon steel for durability and long service life. They are double shielded to avoid contaminants entering and save lubricant. Bearings have 1.4mm deep V groove that generally ride on a rail or track. These are specialized bearings that are used in many linear motion systems. There comes total 20 pieces bearings which you may use for many different projects. Specifications: Material: Carbon steel Model: U624ZZ Inner Diameter: 4mm / 0.15 Outer Diameter: 13mm / 0.51 Height: 7mm / 0.27 U Groove Width: 5.2mm / 0.2 U Groove Depth: 1.8mm / 0.07 Quantity: 10pcs Package Includes: 10 x Bearings Note: 1. Due to the different monitor and light effect the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-2 cm measuring deviation due to manual measurement.