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