3" wheel in cast zinc housing-inset mount (sold individually)Product I.D.: 7CASRECMETALWheel diameter: 3"Wheel tread width: 1-1/4"Product Material: Cast zinc alloy, flat finish, black, hard rubber inline skate wheelOur inset mounted recessed caster assembly incorporates a high strength cast zinc alloy housing that screws or rivets into area between corners of case you intend rolling. This part is often used in conjunction with our product I.D. 4HARHANPULLCH retractable tow handle as well as our 4HARUBFT791CH heavy-duty rubber feet for leveling purposes. Weight capacity per pair of our corner mount, recessed casters is recommended not to exceed 75 pounds.