Total Core with PVC seat With very good quality Material: Steel,PVC,Foam,ABS The ... Core abs starts with a jerking motion, which causes stain on the neck, shoulders and lower back. The Total Core eliminates ... ’s more! Total Core turns the crunch ‘upside down’, because on the way down, your pushing against the same unique progressive ... Of Tube 1.2mmCE Number: EPTC-JL-S0909966 Total Core AS SEEN ON TV