Dwyer MIDWEST Series SFI-100 Sight Flow Indicator, Single Window, Bronze Body, ABS Impeller, 1-1/2" Female NPT Connections, 5.688" Length x 3.250" Depth x 3.625" Height Inexpensive protection for expensive equipment and systems Compatible with gases and liquids Temperature Limit: 200F (93C) Pressure Limit: 125 psig (8.62 bar) Threaded connections