Flexible brick red silicone O ring seal.It is an Prefect solution for sealing application where there are high temperatures and corrosive liquids or gases involved.Used widely for mechanical sealing, pressure vessel, gas compressor, reaction vessel, heat exchanger, boiler, filter, automobile, electrical appliance and other fields.Product Name: O RingMaterial: SiliconeInside Diameter: 3mm/ 0.12 inch Outside Diameter: 8mm/ 0.31 inch Thickness: 2.5mm/ 0.1 inch Color: Brick RedWeight: 6g / setPackage Contents:500 x O RingOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.