10pcs U624ZZ U Groove Ball Bearing Pulley For Rail Track Linear Motion System 4*13*7mm

Features: 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 1.8mm U groove that generally ride on a rail or track. These are bearings that are used in many linear motion systems. There comes total 10 pcs 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: .2mm / 0.2\\\" U groove Depth: 1.8mm / 0.07\\\" Quantity: 10pcs Package Includes: 10 x Bearings Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.