This Core Plug from febi bilstein, part number 07537, is designed for precision fit and OE matching. It is compatible with VW and Audi vehicles. The plug has an outer diameter of 16 mm and weighs 0.01 kg. It is also known as a Frost Plug. Cross-references include 3RG 84008, SWAG 32 90 7537, and TOPRAN 110 262. OEM references it is compatible with are AUDI 2RD103113B, N0119031, N0119033 and VW 2RD103113B, N0119031, N0119033. Ensure this part is correct for your vehicle before purchase. Installation should be done by a competent individual. Products are usually supplied without fitting instructions.