Broan DC4 Duct Collar
This Broan DC4 Duct Collar is for use with models 636 and 636Al. This Duct Collar is an easy attachment of 4 inch air duct. This Duct Collar is easy to install when the instructions are followed correctly. This Duct Collar corresponds with other models so it can connect. This Duct Collar is very convenient to other parts.