When it absolutely, positively needs to be quiet. Specially designed dual grip ring technology eliminates excessive noise, providing quiet mobility. Designed to fit most metal base furniture. Futura Casters—Fits 1.5" bases and features an oversized neck to create the illusion that the caster and the associated furniture base/leg are one continuous unit. Soft polyurethane wheels for hard flooring and chair mats. Caster/Glide/Wheel: Caster; Color(s): Matte Black; Color Family: Black; Stem Type: Grip Ring Type R Stem.