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Honeywell Modbus Communication Module S7810M 1003 for 7800 Series Burner Control:
$200.00
Honeywell Modbus Communication Module S7810M 1003 for 7800 Series Burner ControlSEE IMAGES - product packaging had gotten damp at one point, but the item itself appears to be fine. Unable to test to verify, but a full refund will be given if item does not work as intended.
