This is a replacement mattress for use with the Drive Med-Aire Alternating Pressure Mattress Replacement System (Model# 14027). This replacement mattress is not meant for use with other pressure mattress systems. This replacement mattress features twenty 8" air bladders that can be removed and replaced if necessary. This is a replacement mattress only, and does not include the pump necessary to inflate the mattress. Dimensions: 36"W x 80"L x 8"D.