Part Number: 0-0142178-2 (Tyco plaselec female hsg 20w mic) Part Number: 0-0142178-3 (Tycoplaselec female hsg 20w mic ) Part Number: 0-0142179-1 (Tycoplaselec male hsg mic mk1 20) Part Number: 0-0142179-2 (Tyco plaselec male hsg 20w mic m) Part Number: 001421801 (Differential) Part Number: 001421811 (Amp) Part Number: 0-0142183-1 (Tyco) Part Number: 0-0142184-1 (Tyco / te connectivity) Part Number: 0-0142186-1 (Tyco amp) Part Number: 0-0142191-3 (No description) Part Number: 0-0142193-2 (No description) Part Number: 0-0142193-4 (No description) Part Number: 0014219604730 (Coupling) Part Number: 001421L2BC (No description)