63801ZZ Bearing 12x21x7 Shielded Ball BearingBall Bearings 63801ZZ 12 x 21 x 7 One Bearing Ball Bearing 63801ZZ, the 63801ZZ inner diameter is 12mm, the 63801ZZ outer diameter is 21mm and the 63801ZZ width is 7mm, 63801ZZ is commonly used in industrial, commercial, and mechanical systems, 63801ZZ Made from high strength chrome steel for durability and performance, has 2 Metal Shields to protect the bearing from dust or any possible contamination, 63801ZZ bearing is pre lubricated with grease.