Whiteside Manufacturing  USA Made - 2.5" Replacement Caster (#25) -Will Fit Model(MTLV6) (MTL2UP) (CRS) (MTLV6ADJ) (SPP25)  (SPP25DT) and Most 3/4" Square Tube Frame Creepers Can be used on Whiteside Manufacturing part numbers of MTLV6, MTL2UP, CRS, MTLV6ADJ, SPP25DT and SPP25