From the product description, check product page for current description, price and availability:

Take your beer with you when you go to the beach, camping, a game, or to a party. Our Sodastream® compatible Mini Regulator fits any standard Sodastream® C02 tank without the need for adapters.

The system is built around a 0-25 psi C02 regulator that features precise adjustment.

This regulator does not include an outlet adapter. It has a 1/8″ female NPT outlet port, and you can order an optional Duotight compatible outlet, or a 1/4″ Male Flare Outlet to fit standard 1/4″ female beverage flare fittings. The regulator is 3 1/8″ tall when not attached to a tank.

The regulator does not include a needed Sodastream C02 tank. These can be purchased at many large box retailers and home goods stores, and can also be exchanged at these stores inexpensively.

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