This Medium Channel Armrest has been designed for use with the AquaMaster Tilt-In-Space Shower Commode Chair. The armrests, along with the backrest, must be used at all times when the chair is occupied for safety purposes, but it\'s worth noting that the Channel Armrest can only be used with fixed armrests and is not suitable for use with tip-up armrests. The fixed armrests on the AquaMaster Shower Commode Chair are adjustable and can be easily removed for an effortless side transfer onto the chair.