Heater Inlet PortLead Time on Ports: 1. 5 Weeks A weatherproof, pass through port for an externally ran heater! Available in 2" (50mm) or 3" (75mm 76mm) sizes to accommodate most diesel and propane heater duct sizes. Comes with hardware to secure the port on your camper and a weatherproof plug to keep the elements out when not in use (plugs can be fitted from either the interior or exterior of the camper). Able to attach with either rivets or nuts bolts because we