The permanently fused felt layer on this Madico Fusion Feltac(TM) caster provides scratch protection and noise elimination on hard surfaces. The double-wheel design improves maneuverability and mobility of furniture as the twin wheels rotate independently to make turning or reversing direction effortless. The furniture caster operates smoothly, making it suitable for use on hardwood, tile, linoleum and ceramic areas. A friction grip mounting stem that is 7/16" in diameter and 7/8" long make it easy to install. The dual-wheel caster is 2" in diameter and has a load capacity of 66 lbs (30 kg).