Why I used Color Suns Coffee Valve and their Coffee Valve Applicator Machine? Because of the high quality and the good service!They can offer me the true one-way degassing coffee valve,and the easy control valve applicator machine.I am very appreciate with their service.While I have some questions on the details of the products,they can answer my queastion very fast.I am satisfied with this so much.---By Mr.Ali From Indonesia.