Radial Ball Bearing Shielded Bore Dia 20mm Outside Dia 52mm Width 15mm Dynamic Load Capacity 3.600 lb. Static Load Capacity 1 770 lb. Temp Range -20 Degrees to 250 Degrees F Pressed Steel Cage Material Synthetic Rubber Molded to a Steel Plate Seal Material Rust-Resistant Metal Shield Material SRI#2 Grease