Filter kit, for the GM180 automatic transmission, as fitted to Rover SD1 from 1983 onwards, 2000, 2300, 2600, 3500 including Vitesse and Vanden Plas / EFi models. 
If you've got a 1983 car and you're not sure which box you've got, the GM has the dipstick on the drivers side of the engine compartment (RHD)

Kit comprises filter, filter gasket and sump pan gasket.

Free postage to the UK, I can send worldwide using the GSP