Casters feature dual grip ring technology that eliminates excessive noise for quiet mobility on all floor surfaces. Soft polyurethane material eliminates black powder residue created by metal-to-metal friction. Duet twin-wheel casters complement all types of office and home-office furniture. Smooth-rolling wheels provide maximum mobility on light-to-medium duty applications. Soft wheel casters with a 110 lb. per wheel weight rating are designed for hard floors and chairmats.Casters feature dual grip ring technology that eliminates excessive noise for quiet mobility on all floor surfaces. Soft polyurethane material eliminates black powder residue created by metal-to-metal friction. Duet twin-wheel casters complement all types of office and home-office furniture. Smooth-rolling wheels provide maximum mobility on light-to-medium duty applications. Soft wheel casters with a 110 lb. per wheel weight rating are designed for hard floors and chairmats.