Strobels Denver hard-side waterbed mattress set is a complete, upholstered, wood-frame waterbed. The Denver waterbed set includes a premium Strobel hydro-support 1800 waveless waterbed mattress, standard pedestal (black), wood decking, upholstered frame (side rails and foot rail), hard-side heater, fill & drain kit, waterbed conditioner, and a heavy-duty stand-up safety liner.Strobels hydro-support 1800 is a waveless waterbed mattress with 6 layers of internal, full-body support fiber as well as an additional 3-layer lumbar support, a deep molded surface for pressure reduction and greatest conforming comfort, 4-way tethered corners to prevent internal shifting, heater compatibility, underside seams for greater durability, 25mm vinyl, and reinforced corners.Strobel waterbeds do not require toxic flame retardant chemicals like other mattresses to comply with federal fire safety regulations. Size: Twin, Color: Black Fabric