SFR156-2RS Hybrid ceramic Stainless steel sealed bearing with ZrO2 Ceramic Balls Electric motor quality, SFR156-2RS Bearing is a popular size that could be used in many application that uses this size 3/16" x 5/16" x 1/8", SFR156 bearing is closed with 2 Rubber Seals and double sealed, one seal from each side to protect the bearing from dust or any possible contamination, also bearing is pre-lubricated with grease, SFR156-2RS Bearing has industrial packaging.