Echo Shower Chair and Commode is constructed of healthcare grade PVC pipe and fittings. PVC has advantages using stabilizers that inhibit the growth of bacteria and fungi. The dual reinforcement into the caster fittings add additional support. Comes with a quick drying and removable back support. Echo Shower Chair and Commode comes with 3 twin casters. Back upholstery comes in Mesh material. Standard. Internal Width: 18 . External Width: 22 . Capacity: 250 lbs.- SKU: MJMIC281