This is a new replacement rubber grommet seal suitable for the electric and manual aerials antennas fitted to the Mercedes Benz W638 638 V Class V-Klasse Vito models which utilise the ball-top type of fitting where the aerial is located through a push-fit rubber grommet in the front wing. It is angled at approximately 48 degrees to match the wing profile and fits the existing 44 x 27 mm oval hole in the front wing. It is a genuine Mercedes component, as factory fitted under part number A 6388270098 ( A 638 827 00 98 ). Please note this is a GENUINE part as supplied my Mercedes Benz of Germany. Most sellers claim to sell genuine parts when they are after-market versions copied in China.