... frictional resistance ,high limiting speed,solid durable,high universality and low noise. OEM orders are welcome Bore size: 10 ... , 6200, 6300, 6400 series Durability: perfect Materials: chrome and stainless steel Quality: ISO 9001:2008 Main market: America, European ... Application: precision instruments, low noise motors, automobiles, motorcycles, and other common machinery, as a widely used type of ...