The Ab King Pro offers proper neck and back support, keeping you in perfect form. It offers you different ranges of motions for different levels of resistance. It is perfect for every fitness level, i

Production name: AB coaster 1). All Steel Construction?? 2) .5" Steel Rails??? 3). Polyurethene Rollers??? 4). Free-style Seat Movement?? 5)? Steel Bearings??? 6). Vinyl Covered Molded Foam Pads? 7).