Stott Pilates Staiblity Ball Power Pack Focus on increasing core stability while challenging the deepest stabilizing muscles in the body Includes: Stability Ball, Hand Pump, Core Balance DVD and bonus Easy Start poster Available in 3 sizes: 55cm (22") Stability Ball is ideal for those under 170cm (5'7&quot;) tall, 65cm (26") Stability Ball is ideal for those under 170 - 185cm (5'7" to 6'1") tall , 75cm (29") Stability Ball is ideal for those taller than 185cm (6'2"). Sold individually The ultra-durable, anti-burst STOTT PILATES Stability Ball has a non-slip, polyvinyl ribbed surface and is latex-free Tested under 250kg pressure