This Exercise Disc is an inflatable 14 super soft vinyl disc Perfect for lower back pelvis balance and posture exercises this exercise disc is smooth on one side and knobbed on the other The disc can be inflated from 1 to 2 5 to suit your fitness needs At we stand behind our products and ensure that we can foster an experience that fully aids you in reaching your desired goals We carry over our products tailored to the team and individual athletic market fitness enthusiast physical education programs and the educational market We value our users and ensure that our high quality products are always attractively Features . Super soft vinyl disc 14 . One side is smooth and the other side knobbed. Perfect for lower back pelvis balance and posture exercises. Can be inflated or deflated from 1 2 5 Specifications . Color Blue. Size 14 D x 2 W. Weight 2 83 lbs