Mobile Base only for X Large 3 piece Floor Sitter Staircases This cushion uses AIR IN Autoclavable Up to 325 This cushion uses AIR IN PLACETM positioning in a uniquely designed two manifold system for enhanced midline channeling of the femurs lateral stability and skin soft tissue protection * The cellular design and the soft pliable material allow the individual to be immersed into the cushion for maximum pressure redistribution while decreasing friction and shear * Adjustable: Cushion is adjustable to individual's shape and weight * Cushion is adjustable to changes in individual Weight Capacity * Carbon steel frame with TRIPLE coated chrome for an attractive chip proof maintainable finish * Reinforced steel gussets at all weight bearing points provide additional strength * Durable reinforced nylon upholstery * Extra large padded armrests provide comfort and support * Steel spoke wheels are strong and maintenance free * Precision sealed wheel bearings in front and rear ensure long lasting performance and reliability * Extra large heavy duty aluminum footplates provide maximum support are attractive and crack proof * Heavy duty flat free 8 front casters are adjustable in 3 positions * Extra heavy duty front forks * Reinforced side frame caster journals and dual cross bars * Comes with push to lock wheel locks * Limited Lifetime Warranty * Flat mobile base only * Seat wedge and base are secured to each other with velcro * Individual may be moved without repositioning *