Name: Hole Plugs / GrommetMaterial: Silicone Rubber (Flexible, Food Grade)Hardness: 50°Temperature resistance: -40℃ ~250℃Color: If you would like other colors, please contact customer service.Features: corrosion resistance, acid and alkali resistance, high temperature resistance 250℃, UV resistance, getting old resistance, lengthy provider life, high and coffee temperature resistance, etc.Role: Used for threading and plugging holes, spray platingSize description: the scale is the size of A within the figureHow to determine the size: A size is the scale of the small plug of the rubber plug in the hole. When deciding on the rubber plug, try and favor a size that's one size bigger than the particular size hole. Only on this means can the sealing effect be completed without falling off.Package Include: According in your Choose!