Features chair seat and rear support pad adjustments feature custom, Molded sleeve, Tube inserts inside attractive oval, Shaped steel tubing. Ensures stable, Low, Friction seat adjustments. Ratcheting seat adjustment with push, To, Release lever is color, Coded for easy identification. Viewing hold and etched numbers on sleeve, Tube for accurate positioning of seat and back pad. Hardened plunger and spring, Loaded snap, Pin assembly position adjustment with easy, Grip pull, Pin for smooth adjustment. Pull, Pin is color, Coded for easy identification. Slip, Resistant rubber grip handle assembly with machine alloy end, Cap. Push grips are over, Sized to 1. 5 inch 39 mm diameter. Pull grips and handlebars are 1. 25 inch 32 mm diameter.