High Quality Stainless Steel The kitchen sink stopper is made of stainless steel and rubber, both are durable material, brushed and polished of surface, the stainless steel is rust resistant, the rubber can create a tight seal. Create a Tight Seal The Widest Diameter including the rubber is 3.35". The Rubber Slightly Compresses When You Put It In The Sink To Create a Tight Seal. Fits All Standard Sinks Fits all InSinkerator, Badger, Kitchenaid, Kohler and all other kitchen sink garbage disposals and standard kitchen sink drains. 3-3/8 '' 1-3/8 ''Splash Guards 1/2 Pcs Flange Stopper Collar Sink Baffle Kit Splash Guards Sink Stopper Kit Sink Strainers Sink Stopper Kits Polished Sink Stopper Add to Cart Buying Options Buying Options Add to Cart Add to Cart Customer Reviews 4.5 out of 5 stars 14 3.6 out of 5 stars 35 4.3 out of 5 stars 88 4.6 out of 5 stars 318 4.1 out of 5 stars 118 Price $9.99$9.99 — no data — no data $9.99$9.99 $9.99$9.99 Size 3-3/8 ''；1-3/8 '' 3-1/2'' 3-3/8 ''；1-3/8 '' 3-1/2'' 3-1/2'' Material Rubber 304 Stainless Steel; Rubber Rubber 304 Stainless Steel 304 Stainless Steel；Plastic Color Black Black; Silver; Gold Black Silver Black; Light Black; Gold; Plastic; Polished; Brushed