High Quality Rubber Material: --It is made of heavy-duty rubber,not cheap plastic,which is durable for long life. The solid rubber material of the stoppers is more durable, more heat-resistant, and is not sensitive to household chemicals. Universal Fit for 3 1/2 in Sink Drains: --Fits standard 3-1/2 in diameter drain openings. Our replacement sink stopper for garbage disposal is suitable for -erator, Whirlaway, Baga, Kohler, Moen, Waste King, Kitchenaid, etc. For non-disposal drain, it can also use as a drain plug/stopper. Excellent sealability: --This sink stopper fits your sink perfectly. The outer 1/8th inch is flexible rubber to make it fit tight in the drain, when you use, the section of the stopper will compress slightly, making your sink tightly sealed. Function: --The sink stopper for Garbage Disposals is designed to stop water and food particles from traveling down the drain, hold water in your sink and blocking some food waste from entering into the disposal unit and causing internal damage,so it can protects your disposal. Easy to Insert and Remove: --The textured surface will ensure that the stopper won't become slippery while the protrusion at the top of the stoppers provide adequate leverage to easily pull the stopper out.So it is easy to insert and remove from your sink drain.