: regulator kit is aluminum and, this kit is a practical accessory for kegs brewing WIDE USE: This charger can help make your homebrew, kombucha,, iced tea, sparkling water,, mixes, and any other beverage you want EASY TO USE: charger for 0-90 meter, scale is clear and easy to read, and to use Size: Outlet is 8mm / 0.31inch, usually connects to 5 / 16 " tube EASY TO CARRY: The portable size allows you to take it to any outdoor party, barbecue or gathering