Caster 4 In.,Fixed,375 lb Capacity, For Use With Grainger Item Number 19H365, 19H366, 19H367, 20UY83, 20UY84, 20UY86, 40AL24, 40AL25, 40AL26, 40AL27, 40AL28, 40AL29, 40AL30, 40AL31, 40AL32, For Use With Mfr. Model Number GR-1500DB219-PU, GR-1500DB219AT, GR-1500DR219, GR-1500DR219-PU, GR-1500DR219AT, GR-1500PCB219-PU, GR-1500PCB219AT, GR-1500PCR219, GR-1500PCR219-PU, GR-1500PCR219AT, GR-1500PTB219-PU, GR-1500PTB219AT, GR-1500PTR219, GR-1500PTR219-PU, GR-1500PTR219AT, Fits Brand Snap-Loc