Super-Pro® 23315-031-000 1.5" Gray Pulsator Jet Internal. When you replace a standard gunite jet internal with a CMP Deluxe Gunite Jet Internal, bathers have a choice in jet return besides a basic directional eyeball fitting. The fast and easy way to add enhanced therapy performance using standard pool fittings. This 1-1/2 " Gunite Jet Internals install simply using standard wall fittings with 1.5 " FPT threads. An easy way to expand your wall return options beyond a typical directional eyeball fitting.