The YR Exercise Ball is a PVC stability ball available in 55 cm, 65 cm, and 75 cm options. According to the listing, it is intended for workouts, balance and core training, stretching, rehabilitation exercises, pregnancy support, and use as an alternative office seat.
A hand pump is included. The seller advises inflating the ball to roughly 80% first, allowing it to rest for one to two days, then bringing it to its recommended size.
The product page describes the ball as non-slip and anti-burst, with slow-deflation construction and a claimed capacity of up to 800 lb. Treat these as manufacturer claims and select the diameter carefully for the intended activity.
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