With smooth and polished surface, the ball bearing works with high efficiency and low noise. High temperature resistance, able to work in temperatures ranging from -20 to 200°C or more. Made of premium steel, sturdy enough for long-term use. Widely applied in many fields: industrial machinery, cars, ships, household appliances, health systems, etc. 2 rubber seals protect against water and dust or other invasion. 1 x3 x1cm