Mxfans5 x Silver BQE-04 1/2" Air Quick Exhaust Valve Pneumatic the-way Aluminum

my only complaint is the threads on one of the inputs is slightly crooked on all my valves so the iniput and exhaust isn't a straight line, but that doesn't matter much, the opening of these valves is so fast it's almost too powerful for the ping pong gun I built for indoors. I put a mini 3" long tennis ball barrel on the ping pong gun and it was more powerful than my full size tennis ball gun cannon that used a 1" sprinkler valve. That right just one of these will car out perform any sprinkler valve for a handheld air cannon.

They seem alright

These valve seem to function properly, but only useful for light duty applications.When we installed using wrenches, P-port cracked right away, as wall thickness is way too thin!If for light duty and hand-tight is sufficient, probably still ok value.

It works just well, acomplishes what it promises, its as described.