Size information: wheel stem diameter: 1/4 inches, stem length (25mm). A group of 4 cast wheels: 4 foot wheels have brakes. The packaging is equipped with 4 foot wheels, 4 adjustment nuts and 1 wrench. Easy to install: The wire shelf wheel is only compatible with the diameter of the 1/4 inch stem. These are a "" line -foot wheel, not the "thin" wire foot wheel. Please measure the stem size of the old foot wheel before purchasing to avoid the purchase of errors. Extensive application: This rotating stem and can also be used for light and medium -sized materials treatment, stent equipment, printing racks, coffee tables, sleds, bed storage frames, plant brackets, bookshelves, and so on. Each wheel 110 pound load capacity: The maximum weight capacity of the 4 metal frame feet is 330 pounds. Material: Metal colour: As shown Package Contents: 4 x 1/4inchx25mm foot wheels 4 x nuts 1 x wrench Only the above package content, other products are not included. Note: Light reflection 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.