20PCS 3mm x 7mm x 3mm Double Shield 683ZZ Deep Groove Ball Bearing
Ball BearingGeneral Information：[1]Pre-Lubricated, Easy to maintain[2]Shields on BOTH SIDES of the bearing to keep dust out. Suitable for high speed operation[3]Made from Carbon Steel, durability and resistance to under heavy loads[4]ABEC Tolerance 1 (P0) for most general use[5]Size: 683ZZ (Inner Dia.=3mm, Outer Dia.=7mm, Thickness=3mm).