20pcs Silicone Snap in Locking Hole Plugs 6.5mm Narrow Groove 2mm for Kitchen Waterproof Sealing Plugs Grey

What is this? Round silicone plugs is suitable for Instrument and meter aviation industry transportation radio motors make up appliances furniture manufacture and waterproof plugs sealing plugs test tube plugs rubber bulkheads caps cylinder plug heads threaded rubber plugs etc. Is there any advantages of the product? It is made of silicon material High elasticity good insulation and sealing performance compression resistance shock absorption anti-slip wear resistance 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.