Shelf Adaptor Caster 4 In., For Use With Grainger Item Number 14U077, 14U078, 14U079, 14U080, 14U081, 14U082, 14U083, 14U084, 14U085, 14U086, 14U087, 14U088, 14U089, 14U090, 14U091, 14U092, 14U093, 14U094, 14U095, 14U096, 14U097, 1PWY1, 1PWY3, 1PWY5, 4DU94, 4DU95, 4DU96, 4DU97, 4DU98, 4DU99, 4DV10, 4DV11, 4DV12, 4DV13, 4UX41, 4UX43, 4UX47, 4UX49, 4UX51, For Use With Mfr. Model Number K3624B, K4824B, K6624B, K9624B, KT3624B, KT4824B, KT6624B, KT9624B, Fits Brand DuraShelf, Type 4 in