... quality Material: Steel,EVA/PVC,Foam,ABS Accessories: IB,CD,timer,ball,pump,rope Total Core abs eliminates this ... abs starts with a jerking motion, which causes stain on the neck, shoulders and lower back. The Total Core ... more! Total Core turns the crunch ‘upside down’, because on the way down, your pushing against the same unique progressive ... 1540pcs (40’GP) / 1800pcs (40’HQ) Total Core AS SEEN ON TV