DEBRIS-RESISTANT THREADED STEM CASTER, SWIVEL CASTER, 280 LB LOAD RATING, 0 TO 299 LB, 5 IN WHEEL DIA., 1 1/4 IN WHEEL WIDTH, THERMOPLASTIC RUBBER WHEEL/TREAD MATERIAL, 6 1/64 IN MOUNTING HEIGHT, PRECISION BALL, 1/2 IN.-13 X 1 IN CASTER STEM SIZE, THREADED, STEEL CASTER FRAME MATERIAL, ZINC PLATED FRAME FINISH, YES NON-MARKING, 1 NUMBER OF WHEELS