ABEC-3 Ball Bearing 17x26x5 61803-2RS Stainless Steel and Ceramic Balls One bearing Stainless Steel Ceramic Balls ABEC-3 quality, this is a popular size that could be used in many application that uses this size 17x 26x 5, each bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination, also bearings are pre-lubricated with grease.