Set of 6 TruePower 1" Roller Ball Transfer Bearings 360 universal transfer bearings - Load rating is 110 pounds each Excel where shop materials are pushed and turned in all directions Rollers have 1" hardened steel balls rotating on 1/8" internal bearings 30mm high x 43mm wide x 69mm long(base mounting bracket) FOR USE BEARING SIDE UP ONLY, NOT FOR USE AS CASTOR WHEELS