PVC FLAT CHANNEL DUCTING PVC Flat Channel Ducting Parts For Cooker Hood and Extractor Fans. 150mm x 70mm ( 6†Single Brick Size) 2 Straight Lengths :: 1 @ 1 metre Long and 1 @ 720mm Long. 1 Channel Connector :: 1 Channel Joining Piece 2 Elbow Bends :: 2 90 Degree Elbow Bends. Priced to Sell !!! Only £5 For the Lot !! Would Cost Over £20 From B&Q !! Collection Only From Luton LU2.