Dynamic Stabilizer Ball Base Oxygen Masks 8A * Electrical Shock Protection: MSHQ 1594XL 8A * Electrical Shock Protection: Charger: Class II s hand and wrist angle and to minimize stress on the joints *Ortho Ease© grip is ideal for arthritics and for those needing a wider grip for greater support *Comes complete with convenient wrist strap * Lightweight portable gym ball base measures 19 5 diameter and fits a 45 55 65 and 75 cm exercise ball * Use base to stabilize exercise ball and prevent ball from rolling around gym * Use base with band or tubing for dynamic workout * Base has 4 built in anchors and 2 grooves for exercise band and tubing