R20-2RS Bearing 1-1/4" x 2-1/4" x 1/2" SealedR20 2RS sealed Ball Bearing 1 1 4" x 2 1 4" x 1 2" inch R20 2RS sealed Ball Bearing, made from durable 52100 alloy steel, commonly known as chrome steel, this bearing is sealed with rubber seals to protect the bearing from dust or any possible contamination, this is self lubricated bearing (bearing is already greased). R20 2RS Ball Bearing Deep Groove Ball Bearing Material: Chrome Steel Closures: Two Rubber Seals Quality: Electric Motor Quality