This fuel cap hard to find and it is OEM with raised small VW logo in the center fits like glove Zinl plated and it is 60mm size.  This fuel cap fits only on gas tanks that has inner locking teeth to lock the cap in place and NOT outer locking.  Fits Bus Kombi 1950-1967 and after market tank Beetle 1961-1967 inner locking teeth on the neck of the tank.  New~