The PowerLine PAB139X Ab Board is balanced on a sturdy, telescopic 5 x 5cm steel support beam.12 easy-to-adjust positions let you alter your machine's resistance and difficulty level, allowing for customized sit-ups and crunches.A DuraFirmô double-stitched pad features extra width and extra strength for the ultimate in comfort and durability.Extra head and upper body support for comfort, safety, and added effectiveness.Very efficient to isolate the abdominalsBack pad: 56 cmExtra-large, 20 cm rollers hold you firmly in place as you exercise.Electrostatically applied powder coated scratch resistant paintIdeal for home use