4x1" (100mmx25mm) Black Aluminum Lightweight Rim Frog Legs Caster.
 
Three-spokes ultralight aluminum caster wheel. Custom-made 6061-T6 aircraft grade aluminum wheel that is machine-lathe for a perfect balance. Priority high-resilient solid urethane thread is designed to minimize energy loss and absorb vibration. Spherical arched-tread design improves pivotability for effortless turns and enhanced stability. Extra width better distributes downward pressure allowing the wheel to maintain higher flotation and significantly reduces immersion into carpet gravel, etc.
 
ITEM# MCC24BB