The ORING 09-016X3X5.5 VA-18 NBR is an elastic material seal with a V-ring washer. It is made of nitrile butadiene rubber (NBR), has a shaft diameter of 17.5 to 19 millimeters (mm), a length of 5.5 mm, and an outer diameter of 16 mm. The product is designed to provide a tight seal in a variety of applications and environments, preventing the ingress of liquids, gases, dust, and dirt. It is suitable for joining two parts in rotation, compression, or tension, and can resist a wide range of temperatures and chemical compounds.