The D45ZK09-DBP-K is a manufactured part made by Encitech. It is an O-ring that follows MIL-spec SAE AS5862-006, and is made of a 90 durometer nitrile material. It is a dual durometer o-ring that is designed to seal around high pressure, low cycle applications and is suitable for use in a variety of media, including oils, fuels, water, air, and other fluids. The O-ring has an internal diameter of 0.9”, an outer diameter of 1.265”, and a cross section of 0.0866”. It is designed to be used with temperatures ranging from -65°F to 300°F.