Simplex 565-654 Duct Housing Assy Board

Simplex UT Assy 565-274 Master Universal Motherboard PC Relay Circuit Board

Simplex 565‑831 Duct Detector PC Board

NEW, OPEN-BOX, SIMPLEX 4098-9756 AIR DUCT SENSOR HOUSING, 4-WIRE

Simplex 565-834 Duct Detector 2 Wire Board With No On Board Relay.

SIMPLEX 565-124 4-WIRE DUCT HOUSING REPLACEMENT BOARD

Simplex 0631132 Duct Sensor Detector Housing 4098-9755 *PI