Features: Thin section ball bearings are used for applications where space limitations are of the utmost importance. The difference between the inside and outside diameters of the rings has been minimized or thinned out. Made from high quality bearing steel, these bearings have low noise and long service life. They are double shielded to avoid contaminants entering and save lubricant. There comes total 10 pieces miniature bearings which you may use for many different projects. Specifications: Type: 6700ZZ Material: Bearing steel Inner Diameter: 10mm Outer Diameter: 15mm Thickness: 4mm Quantity: 10pcs Package Includes: 10 x Bearings