What is this?T Shaped silicon stopper is suitable for Powder Coating, Painting, Anodizing, Plating & Media Blasting,waterproof plugs, sealing plugs, pipe holes, test tube plugs, rubber bulkheads, caps, cylinder plug heads, threaded rubber plugs.What will I get?High Temp Silicone Plug,total Size:13x12.5x3.5mm/0.51x0.49x0.14 Inch(OD x Total Height x Height);Mount hole diameter:7mm/0.28 Inch;Material:rubber;Color:White;In the package of:20pcs x Silicone Plug;Is there any advantages of the product?It is made of silicon material,High elasticity, good insulation and sealing performance, high temperature resistance ,acid and alkali resistance, will not dissolve and swell in acidic liquids;How to use it?Fingertip pressure snap-locks into its mounting hole.What should I notice?Due to manual measurement, the size may have an error of +/- 1-2mm. And a slight deviation in color due to different batches.