"This Metro Machine 1/2in. selector valve is made of high-strength cast iron with a chrome-plated, pressure-balanced spool. The 6-port double selector valve diverts two flows in either of two separate circuits. Enables you to run two cylinders with one value. 3000 PSI. Measures 5.88in.L x 2.44in.W including knob x 3.62in.D. U.S.A. Material Type Cast Iron, Max. PSI 3,000, Max. Flow GPM 20, Port Size in. 1/2. High strength cast iron construction Open crossover type valve with a chrome plated, pressure balanced spool When the spool is moved and one pair of outlet ports start closing, the other pair of outlet ports will open Small, reliable and easy to install 5.88in.L x 2.44in.W including knob x 3.62in.D Port Size 1/2in. - 14 NPT Max Flow 20 GPM Max PSI 3,000"