Deluxe elongated extra heavy duty contoured open front seat. All casters and backs are double wall reinforced with schedule 40 1" PVC. Aesthetically pleasing, with curved/bend arms. Anti-slip safety hand grips. Fast drying and removable mesh back/sling. Personal pocket/pouch. All models fit over standard height toilet commodes. Structurally designed with 30% more security with four stainless steel bolts on commode seat. Single wheel heavy duty casters (3" x 1 1/4") with removable bolt/nut for easy maintenance. All casters have threaded stem for extra security and safety, casters will not fall/pull out with normal use.- Shower Chair, 18" Internal Width, 3" Twin Threaded Stem Casters, 300 lbs Mfr. Direct