Psychomotor exercise ball - comprises one-piece inflated and stabilised body with insertion hole for auxiliary balls and stopper

摘要

The ball, of dia. up to 2 metres, is for psychomotor(sic) exercises, accommodating auxiliary balls of small dia. opt. It comprises a one-piece inflated and stabilised body, with a hole at one polar position of dimensions to match those of the auxiliary balls. The hole is sealed by a movable stopper, with opt axial inflation passage closed by a detachable stopper. The main ball can be of transparent polyvinyl chloride, and the polar portion can protrude outwards or inwards, the hole in it being between of 2 to 6cm dia.. ADVANTAGE - Prodn. is simple, and auxiliary balls can be easily interchanged.