TRIUMPH PRE UNIT OIL CAP. MADE IN UK WE ARE SELLING AN OILGAS CAP FOR YOUR PRE UNIT TRIUMPH. THIS FITS ALL 1954 AND LATER, PRE UNITS UNIT OIL TANKS AND IS MADE IN ENGLAND. IT IS THE SAME SIZE AS A REGULAR BRITISH GAS CAP BUT IS NOT VENTED LIKE THE GAS CAPS. WE HAVE ALL THE OTHER PARTS YOU MAY WANT OR NEED WHILE REPLACING OIL TANK FITTINGS. PLEASE CHECK OUT OUR EBAY STORE FOR ALL YOUR BRITISH BIKE NEEDS. VINTAGE TRIUMPH SUPPLY SPECIALIZES IN VINTAGE BRITISH MOTORCYCLE PARTS. WE HAVE OVER 10,000 PARTS AVAILABLE. IF YOU CANNOT FIND SOMETHING ON OUR EBAY STORE PLEASE CALL AND WE WILL DO OUR BEST TO GET YOU THE PART YOU NEED FOR YOUR MOTORCYCLE. WE HAVE OVER 10 YEARS EXPERIENCE REBUILDING, RESTORING AND MAINTAINING BRITISH MOTORCYCLES, SPECIALIZING IN TRIUMPHS. THE INSTALLATION OF SOME OF THESE PARTS CAN BE DIFFICULT AND WE WILL DO OUR BEST TO ASSIST YOU WITH THEM. ALSO WE CAN TRY TO ANSWER ANY OF THE QUESTIONS YOU MAY HAVE.