Uxcell Silicone Snap in Locking Hole Plugs 3.5mm/0.14 Inch Dia for Waterproof Sealing Plugs Black 30 Pcs

What is this? Round silicone plugs is suitable for Instrument and meter aviation industry transportation radio motors make up appliances furniture manufacture and general light engineering 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.