What is this?This sealing gasket is widely used in chemical, metallurgical, mechanical, electronic, electrical, construction and other industries. It is very suitable for faucet pipes, hose bolts, valves or other gardening maintenance or modification, as well as electrical insulation materials and linings, support slides, guide rail seals and lubricating materials in contact with corrosive media.What will I get?The flat washers, ours provided here are in size of: Outer Dia: 8.5mm / 0.33inch; Inner Dia: 3mm / 0.12inch; Thick: 2mm / 0.08inch; Material: PTFEIn the package of: 24 x Flat WashersIs there any advantages of the product?Made of premium polytetrafluoroethylene (PTFE), it has a smooth surface, high density, is not easy to crack, resistance, corrosion resistance, high pressure resistance, high and low temperature resistance, is non-conductive, non-adhesive, strong sealing, and durable.How to use it?Easy to use, just place the washer under the head of the screw or bolt, or under the nut on the other side of the fastened material and tighten it.What should  I notice?Please check the size before choosing our product.