This is a brand new rubber sealing grommet bush or sleeve specifically for the aerials and antennas fitted to the Jaguar XJ40 XJ6 and Daimler versions from 1986 to 1993. It is angled at 5º and fits in the 22 mm diameter hole in the rear wing/fender.

It is a Jaguar Original Equipment part as supplied by the aerial antenna's original equipment manufacturers for Jaguar part number  DBC2246.

Over time if your grommet has become perished, lost, cracked, or become discoloured with over-spray or car wax, this will restore your aerial's appearance. On early models the grommets can deteriorate and let in rain water to the boot/trunk. Jaguar recommends the grommet is replaced if the aerial is removed and replaced