This Febi Bilstein Fuel Line Sealing Ring (part number 38770) is a high-quality replacement part for Mercedes-Benz vehicles. It is made from FPM (fluoride rubber) for durability and features an outer diameter of 13 mm, a thickness of 2.5 mm, and an inner diameter of 8 mm. This sealing ring is designed to ensure a leak-free connection for your fuel lines. Please ensure this part is correct for your vehicle before purchase. It is recommended that installation is performed by a competent individual. The product is supplied as a single unit. We are a UK-based seller with over 10 years of experience in the automotive industry. We offer same-day dispatch for orders placed before 2:30 PM Monday to Friday. If you have any queries regarding fitment or require expert advice, please do not hesitate to contact us.