Fits 16 & 17 wheelchairs. Comes with two stump support sliders. The Uplift StumpRest is a retractable stump support system integrated into a drop seat for wheelchairs. This combination offers below-knee amputees an affordable two-in-one wheelchair seat base to meet their postoperative and everyday needs. Provides unparalleled convenience. Supports and protects residual limbs of below -knee amputees. Helps prevent knee-flexion contracture. Helps reduce stump swelling and the formation of dependent edema.