CFB250NST Dixon Constant Flow Fog Nozzle with Handles - 2-1/2" Female NST(NH) - PolycarbonateFeatures: Red polycarbonate with bumper and black plastic and steel stem 1" and 1 1 2" are ULC listed Maximum operating pressure: 100 PSI (water only) at 70F (21C) Code 1 1 2" Size 2 1 2" Size NYF New York Fire Dept. Thread 1 1 2" (2. 100 ODM X 8 TPI) 2 1 2" (3. 030 ODM X 8 TPI) CF Chicago Fire Dept. Thread 1 1 2" (1. 933 ODM X 11. 5 TPI) 2 1 2" (2. 990 ODM X 7. 5 TPI) NYC New York Corporation Thread 1 1 2" (2. 093 ODM X 11 TPI) 2 1 2" (3. 000 ODM X 8