Allows you to adjust the height of the seat. Adjust the height for a perfect fit The possibility of adjusting the seat height means that Etac Clean Height Adjustable can be tailor-made to suit the user's needs – for example to make transfers easier or to fit perfectly over the toilet. Adjustment is simple and no tools are required. Etac Clean Height Adjustable shower commode chair has the same basic benefits as the other members of the Clean family – but is also height-adjustable up to 60 cm, and has a greater range of foot supports and calf supports.