Non Standard 6201-8-2RS Sealed Bearing 1/2" (12.7mm) x 32mm x 10mm6201 8 2RS Sealed Ball Bearing 1 2" inch x 32mm x 10mm 6201 8 2RS Sealed Ball Bearing, 6201 8 2RS made from durable 52100 alloy steel, commonly known as chrome steel, this 6201 8 2RS bearing is sealed with rubber seals to protect the bearing from dust or any possible contamination, 6201 8 2RS bearing is self lubricated bearing (bearing is already greased). 6201 8 2RS Ball Bearing Deep Groove Ball Bearing Material: Chrome Steel Closures: Two Rubber