●Front clamping mechanism ensures secure, easy locking on to the toilet bowl ●Comfortable support arms add security when using toilet seat(RTS 51H) ●Blow moulded structure made of PE ●Width between the armrests: 18" (RTS 51H) ●Raised seat height: 5" (12.5cm) ●Overall width: 17-1/2" ●Overall depth: 15" ●RTS 51: without armrests ●RTS 51H: with armrests covered with vinyl that offers more support and comfort