Protect and enhance your precious and beautiful floors and furniture with our super cups with Anti-Skid. Madico 2-3/8" Plastic Woodgrain Effect Cups (nonskid). Stop furniture from moving around with Super Cups with Anti-Skid on vinyl, ceramic, tile, laminate and hardwood floors. Consult your floor supplier before applying to a newly finished wood floor. Super Cups with Anti-Skid must be applied on flat surfaces. Do not drop heavy furniture into caster cup, do not install furniture leg on the outer edge or use larger casters than specified. Remove caster cups from under the piece of furniture before moving it around. DO NOT TRY TO ROLL OR SLIDE THE PIECE OF FURNITURE OVER THE CASTER CUP