Features: Made of aluminum, brass and stainless steel material, fine durability and can provides long service time. There is a 1/2 screw hole on the topside, convenient for you to connected to other device. 7mm barbs on outlet-valves for use with professional draft installations. The built in check valve can not only protect your regulator but also prevents gases backstreaming. Please set pressure of regulator 2psi lower than pressure of keg due to its one-way valve structure. Using this product to connect one C02 can to multiple kegs, economic and save money. Reserved mounting holes for easy installation on walls. There are 5 types for you to choose: 2-way, 3-way, 4-way, 5-way, 6-way, you can choose according to your demands.