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Comparison : Item # QCSA-12-6PO-016B, QCSA-PO Series 1/2 Inch (in) Stem x 3/8 Inch (in) Male National Pipe Thread (NPT) Brass Orifice
Item # QCSA-12-6PO-018B, QCSA-PO Series 1/2 Inch (in) Stem x 3/8 Inch (in) Male National Pipe Thread (NPT) Brass Orifice
Item # QCSA-12-6PO-020B, QCSA-PO Series 1/2 Inch (in) Stem x 3/8 Inch (in) Male National Pipe Thread (NPT) Brass Orifice
Item # QCSA-12-6PO-021B, QCSA-PO Series 1/2 Inch (in) Stem x 3/8 Inch (in) Male National Pipe Thread (NPT) Brass Orifice
Item # QCSA-12-6PO-0225B, QCSA-PO Series 1/2 Inch (in) Stem x 3/8 Inch (in) Male National Pipe Thread (NPT) Brass Orifice