Steinberg14 Rectangular 220 x 90 mm / 8x4" Plastic Duct Mount Holder 2 Pieces for Flat Duct Ventilation Systems Ventilation Channels

220mm x 90mm Flat PVC Ducting Clips

Vent Systems 220 x 90 mm / 9'' x 4" Inch - Pack of 2 - White Mounting Bracket – Wall Support Clip for Rectangular Flat Ducting – PVC Holder for HVAC Installation in Kitchen, Bathroom, Home