450mm Rectangular Shoe450mm Rectangular Shoe  Ref: RSH450
Choices on rectangular shoes

These shoes have a 25mm flange that is fixed to the parent duct when installed. This flange can be adapted to suit the duct. Depending on the size of the parent duct, and the way in which the shoe will be orientated, you can choose between the options illustrated on the left. If you are unsure leave it on 'As A'.