Standard Neck—Hard nylon wheels for carpeted floors. Caster/Glide/Wheel: Caster; Color: Matte Black; Color Family: Black; Stem Type: Grip Ring Type B Stem.

 Standard Neck—Soft polyurethane wheels for hard flooring and chair mats. Caster/Glide/Wheel: Caster; Color: Matte Black; Color Family: Black; Stem Type: Grip Ring Type B Stem.

 Oversized Neck—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: Matte Black; Color Family: Bl