Machined from 6061 T6 aluminium, INOVATIV’s 8 In. EVO Wheel System is 30% lighter in weight than comparable steel casters, they are quiet-rolling, and ultra-reliable. Coupled with its 100% Sealed Bearings, the 8 In. Wheel System is, rugged, durable, and designed to withstand outdoor environments. The 8 In. EVO Wheel System comes with 2 Swivel (Steering Wheels) equipped with INOVATIV's EVO Footbrake System and 2 Fixed Wheels; each wheel comes with its own wheel bag.