Rubber washer with excellent oil resistance and NBR (does not generate dioxin even burning). It also has an earthquake effect. [Features] The material is NBR (does not generate dioxins even when burned). Excellent oil resistance. Heat and cold resistant temperatures up to approximately 222°F (100°C) to a minimum of 10°F (-10°C). The rubber is also used to absorb earthquakes. [How to use] Use for sealing screws and other items.