Advantages: 1.The cover of switch button for food waste disposer is 304 stainless steel constructed while the thread plug is ABS plastic with durability to service for a longer time. 2.No tools needed to install the strainers or stopper.Easy to clean by removing it and cleaning with soap water. 3.May be mounted on the counter beside the sink or in an existing hole drilled on the sink ledge. 4.Can also be used in food waste disposer, massage tub, pumps for swimming pools, outdoor machines, automotive applications etc. 5.Note: please double-check the size/diameter before placing an order.Notice:Actual color may be slightly different from the image due to different monitor and light effect.Please allow 1-3cm deviation due to manual measurement.:Material: 304 stainless steel, ABSSize: As the picture shownColor/Style: As the picture shownincludes:chocie 1: 1 x Air Switchchoice 2: 1 x Air Switch, 1 x Hose