http://cgi.ebay.co.uk/6-AN6-06-Rollover-Vent-Valve-Tank-Mounted-/160498213846?pt=UK_CarsParts_Vehicles_CarParts_SM& hash=item255e7063d6
same as in link above but i had the blue fitting anodised black,
You need access into the tank to fit this as the securing nut is fitted from inside the tank, you would also need to drill a hole -6 size,
The large part goes inside the tank and the -6 part on the outside
THIS IS FOR ALLOY FUEL TANKS/CELLS OR SIMILAR NOT STANDARD TANKS
£20 delivered