Common Specifications - Passive Nominal Impedance: 50 Ohms Port-To-Port Isolation: 22 dB (min) 25 dB (typical) Phase (input/output): Zero degree Coupler Gain/Loss:-7dB (MC104/204) Case: Die-Cast Aluminum, Light Gray Baked Enamel Standard BNC Connectors Mechanical: 4-3/8 X 2-3/8 X 1-1/4 Inches (L W H)