Our company produce the throttle controller--RE QEseries,and with 1/8,1/4,3/8,1/ ... 2 port size. Our company produce the throttle valve--RE series,and with 1/8,1/4,3/8,1 ... /2 port size.The model of RE seriesRE-01--port size G1/8RE-02--port size G1 ...