Valor Fitness CB-31 Arm and Triceps Machine 12-gauge steel frame. Vinyl-covered arm and seat pads. For use with standard or Olympic plates (sold separately). 7 seat adjustment options using a popper pin. Ergonomically designed arm/chest pads and hand grips. 28-position popper pin resistance dial. Position 1 (weight behind peg/high-set arm bar) works the triceps; position 2 (weight in front of peg/low-set arm bar) works the biceps. 3 rubber base caps keep floors damage free. 2-year manufacturer's warranty on the pads. 1-year manufacturer's warranty on the popper pin, 3-year frame, 2-year pads. Seat Adjustment: 17.5" to 23.5". Max Seat User Weight: 400 lbs. Max Weight Arm Weight: 150 lbs.