The Fitness Mad Studio Pro Pilates Ring is made of spring steel and built to withstand continuous, high-intensity studio use. Adding resistance to upper and lower-body exercises, this really improves muscle tone and is great for problem areas that are hard to firm up: inner and outer thighs, upper arms and chest. Rings are commonly used in Pilates to add intensity to floor exercises. FEATURES Pilates Rings. Professional Edition. Designed for intensive Studio use. Material: Tri-Band Steel. Construction: Tri-band sprung steel construction. Soft TPE double handles. Sizes: 12" & 14" Diameter. Professional edition sprung steel Pilates resistance ring by Align-Pilates designed for intensive Studio use. This is the smaller of our two rings, offering greater resistance than the 14" version, Rings are commonly used in Pilates to add intensity to floor exercises. The ring's resistance speeds up toning by targeting specific muscles. Especially useful in problem areas like the inner and outer thighs, upper arms, the chest and even the pelvic muscles. This design is based on the original Magic Circle design.