5 Black Chromcraft soft tread casters for swivel tilt caster chairs included. These black dual wheel OEM casters are made for wood, laminate and tile floors. We are the only Current Authorized Chromcraft dealer offering Chromcraft swivel tilt caster chair parts on Amazon. The grip ring stem is 7/16" in diameter, 7/8" tall and the caster is 2" overall. We are the only authoriized Chromcraft dealer offering Chromcraft swivel tilt caster chair parts on Amazon.