Caster; Rigid; 3 x 1-1/4; PolyU on PolyO (Gr/Bg); Plate (2-3/8x3-5/8; holes: 1-3/4x2-7/8 slotted to 3; 5/16 bolt); Stainless; Delrin Spanner; 250# (Item #66560)