Uxcell a11111400ux0059 Swivel Caster 1 5 inch Nylon Twin Wheel Square Top Plate Rotating Swivel Caster For Chair Carts Product Name : swivel caster;feature : twin wheel;wheel Dia. (Each) : 3cm/1 1/5 inch Wheel thickness (each) : 7mm/0.28";plate size : 3 x 3cm/1.2'' x 1.2'' (l*w);total height : 6.3cm/2.5'' Mounting hole Dia. : 4.5mm/0.18'';mounting hole spacing : 2 x 2cm/0.79" x 0.79" (l*w) Main material : nylon, metal;Color : black, Silver tone Weight : 32G;Package Content : 1 x swivel caster