The Traditional Foam Wall Kit replaces your existing foam. All kits include: Base Pad, Center Wall and foam Side and End Rails. . (Split King and Split California King include two sets of side and end walls and two base pads). Locate your bed model on the tab,. Refer to bed size and kit wall height. Labels are normally found at the foot or the head of the bed. For all other bed sizes or models and Sleep Number 360® smart bed parts or call 1-888-411-2188.