SMC VEX3421-045LZ Proportional Valve MSRP: Now: $253.70 Was: VEX3, Power Valve, 3 Position ValvePower valve series VEX includes a regulator valve (VEX1*0), precision regulator (VEX1*3), 3 position valve (VEX3) and a economy valve (VEX5). The 3 port large... VEX3421-045LZ