Our ABEC-3 bearings use the same high-quality steels as our ABEC-5 bearings. We utilize chrome steel balls of grade 10, paired with R-62 hardened rings made from a high-carbon chrome alloy (52100). The ball bearing cage is made of riveted steel. Double-lipped LLB seals keep contaminants and deposits out. ABEC-3 bearings combine extreme durability and smooth operation at an affordable price. Dimensions: 16x31x10.