Product Name: Threaded Stem Caster Wheel;Type: Rotation,Dual Wheel Wheel Size: 40 x 9mm / 1.6" x 0.35"(D*T); Size (.): 45 x 35 x 60mm / 1.77" x 1.38" x 2.36"(L*W*H) Threaded Stem Dia.: 6mm / 0.24";Threaded Stem Length: 12mm / 0.47" Material: Plastic, Metal;Color: Black Weight: 46g; 360 rotation type, threaded stem connector, twin-wheel, office chair caster wheel. Used widely for the furniture, hand trolley, shopping cart, appliances equipments and kinds of industrial equipments. Package Contents: 1 x Threaded Stem Caster Wheel Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.