Features 1、This ball bearing is mainly made of high quality bearing steel and steel material, durable with resistance to wear and collision 2、This is a rubber sealed ball bearing, with good dustproof effect 3、Provides smooth running and long service life 4、With the characteristic of high stability, high reliability 5、 Standardization size, used for machine tool, electronic equipment, pump industry, airship, reducer, plastic machine, motor, textile machinery Specification Features: This ball bearing is mainly made of high quality bearing steel and steel material, durable with resistance to wear and collision. This is a rubber sealed ball bearing, with good dustproof effect. Provides smooth running and long service life. With the characteristic of high stability, high reliability. Standardization size, used for machine tool, electronic equipment, pump industry, airship, reducer, plastic machine, motor, textile machinery. Specifications: Model: MR115-2RS Material: bearing steel, steel, rubber Color: blue Inner diameter: 5mm / 0.20in Outer diameter: 11mm /0.43in Thickness: 4mm / 0.16in Weight: 39g Package included: 25 x Rubber Sealed Ball Bearings Package List