This silicone round snap is very versatile and it makes a great hole plug. It can be used to seal the inlet and outlet of pipes, containers or equipment to prevent dust, water. It can be suitable for different holes, such as waterproof plugs, sealed holes, test tube mouth, flasks mouth, and beakers mouth, water cylinder holes, rubber bulkheads, cylinders, threaded holes, etc.SpecificationColor: BlackMaterial: PVCInner Hole Size: 24x25mm / 0.94x0.98 Inch (OD*L)Outer Size: 25.2x27mm / 0.99x1.06 (OD*L)Package List: 44 x Rubber End CapsAdvantage:Silicone round snap is made of silicone material, with high-temperature resistance, corrosion resistance, waterproof and dustproof properties. It can seal the pipe opening well and protect the pipe opening. moreover, it is soft and elastic. It is wear-resistant and can play the role of buffering and shock absorption.InstructionEasy to use, no tools required. Just plug it into the hole you need to seal.NOTEBefore purchasing, please check whether the applicable plug size is suitable for the aperture of your item.