SPRI Professional Plus Xercise Ball, Balance Ball, 55-Centimeter;

Strong enough for even your most intense workouts, SPRI Professional Plus Xercise Ball professionally designed with heavy-duty, dura-wall construction to take everything you have to give.True slow-deflate capabilities make it the ideal, safe solution for enhancing your weight training and strength training workouts. Includes, slate gray, 55cm Xercise Ball, Instruction Sheet and maintenance pump.