Feature 1This ball bearing is mainly made of high quality bearing steel and stainless steel material, durable with resistance to wear and collision 2Built-in precise micro bearing, with the characteristic of high stability and long service life 3 Low speed, elegant performance and rolling smoothly 4It has excellent high temperature resistance, up to 120 degrees 5Standardization size, used for machine tool, electronic equipment, pump industry, airship, reducer, plastic machine, motor, textile machinery Features: This ball bearing is mainly made of high quality bearing steel and stainless steel material, durable with resistance to wear and collision. Built-in ;precise ;micro ;bearing, with the characteristic of high stability and long service life. Low speed, ;elegant ;performance ;and ;rolling ;smoothly It has excellent high temperature resistance, up to 120 degrees. Standardization size, used for machine tool, electronic equipment, pump industry, airship, reducer, plastic machine, motor, textile machinery. Specifications: Model: ;MR85ZZ Material: bearing steel, stainless steel Inner diameter: 5mm / 0.20in Outer diameter: 8mm / 0.31in Thickness: 2.5mm / 0.10in Weight: 5g Package included: 10 x Ball bearing