Don't damage your hard wood flooring! Most office chairs come with hard wheel casters designed for use on carpeted surfaces. Hard floor surfaces like hardwood, laminate, and tile require a soft caster to protect the floor and the wheel from damage. Get the upgrade you need for your flooring surface with this soft wheel caster set designed to fit most Work Smart and Pro-Line II office chairs. Soft Wheel Caster Fits Most WorkSmart Chairs GREENGUARD Indoor Air Quality Certified® Set includes: Five (5) Casters Materials: Nylon Weight: 1 pound Dimensions: 2 inches high x 2 inches wide x 2 inches long