Caster; Swivel; 8 x 3; PolyU on Cast (Gr/Bk); Plate; 5-1/4x7-1/4; holes: 3-3/8x5-1/4 (slotted to 4-1/8x6-1/8); 1/2 bolt; Zinc; Roller Brg; 2500# (Item #68488)