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

This Flow control beer gun is designed to deliver beer fast and foam free at your event or party.  Extremely well made German product!

• Flow control allows you to dispense beer fast and foam free, you can also use shorter hose length and 1/4″ or larger inside diameter hose for faster flow.  The flow control valve will allow you to restrict the beer flow and control foam, so beer length and inside diameter is not important! (you can even use the braided soda style hose if you prefer).
• Extremely high quality German Made Product.  Made for commercial use in large volume event settings (or to deliver your homebrew at a party with perfection!)
• Easy to use and simple to take apart and clean.
• Parts made from NSF approved Plastics and Stainless Steel.  Sanitary/food service grade product.

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