Cup to Bayonet filler adaptor (10mm) – For cup-type fillers that have a 10mm thread in the centre. This adaptor is about 20mm longer than the standard one. The narrower part is 19mm in diameter. The threaded part at the base is steel for more strength. Given the length of the adaptor, the fill gun must not be allowed to hang on the filler. Allows visitors to fill up in the UK, Holland and Norway.