... Drain(6) Port Size: 1/8", 1/4", 3/8", 1/2", 3/4", 1"2. QAC- F.R.L (Three Combination) (1) All Models: AC2000-01 ... Order example:Model: QAC3000-01QAC- F.R.L(Filter&Regulator&Lubricator), 3000 Body Size, Port Size 1/8", Manual Drain TypeModel: QAC3000-01DQAC ... - F.R.L(Filter&Regulator&Lubricator), 3000 Body Size, Port ...