Uxcell a14111900ux0347 M8 Thread Twin Wheel Rotatable Swivel Caster for Shopping Trolley (4 Piece) Product Name : Swivel Caster Wheel; Material : Polyurethane, Metal Color : Black, Silver Tone; Threaded Diameter : M8/ 0.3" Threaded Length : 12.5mm/0.5";Wheel Diameter : 40mm / 1.6" Overall Size : 63 x 48 x 38mm / 2.5" x 1.85" x 1.5"(L*W*T);Net Weight : 150g Package Content : 4 x Swivel Caster Wheel