Wobble Cushion Stability Balance Disc Fitness Core Trainer Wiggle Pad For Home（PURPLE） The product is shipped based on the color or size of the main image of the product page. Colour:PURPLE Improve Sitting Posture: The ergonomic design of the wobble cushion helps relieve back, shoulder and neck pain caused by long time sitting and working in office.Optimize Your Workout: Balance disc improves the efficiency in workouts, yoga, pilates, ballet and most exercise routines through adjusting the inflated level to change your body posture.Suitable for primary school, home and office use: 34cm Wobble Cushion Diameter 33cm , Height14cm The maximum weight limit is 450 lb. includes an easy-inflation pumpAdjust As You Wish: It is pre-inflated. It comes with a pump so that you can adjust the inflated level as what you want.Unmatched Customer Service: 100% satisfied or fully refunded provides you with professional customer service. Replacement or refund of all products within the 60-day warranty period. No reason needed, no hassle : it’s that simple