This is the same 6061 T-6 fully polished aluminum body and cap as used on P/N: 7912/7904 that we make. The vertical style and smooth knurled edge cap add up to an excellent combination of form and function. Throw away your old filler tube and upgrade to this new cool design! Supplied with 1/4" NPT - 1/2" barbed hose fitting so breather line hookup is easy.