Quantity 2 pack.

EXTRUDED ALUMINUM ANODIZED HEAT SINK.

Optional accessory for ELECTRA-AIR CO2 Generators or Infrared Multi-Fuel CO2 Generators.

IR-28-MF requires two tubes, IR-42-MF requires three heat tubes.

Slides easily into unit.
Fit 4 inch ducting.
Tube is 22 inches long