The Align-Pilates jump board provides you with a firm and stable platform for plyometric exercises and is one of the most popular accessories for the Pilates reformer. Align-Pilates also offers a Cardio Jump Dome alternative to the traditional reformer jump board which you may also like to consider. The A2 jump board can also uniquely be used with our Combo Chair II to convert it in to a high back Chair. Specifications Construction: Steel frame with top quality EVA padding for long lasting memory and excellent shock absorption. Covered with abrasion resistant vinyl. Compatibility: All A Series & M1 Pilates reformer. Can be used with the Combo Chair II to act as a high back Chair. Dimensions (H x W): 23.6" x 25.98" (60 x 66 cm)