150mm / 6 inch Kair Plastic Ducting Connector with backdraught shutter / non return damper flapMale Spigot will fit inside Kair 150mm Round Pipe Part: DUCVKC670 or 152mm Flexible Hose Part: DUCP0092/152/35 and can be used to join multiple lengths of pipe together to form a long duct run.Stops unpleasant odours, noises, or draughts flowing back through your duct. With a gravity flap - no need for springs that break!Use when you need to stop smells flowing backwards within ducting, or when you have 2 or more extractor fans connected to same duct run. Round rigid ducting provides superior airflow performance vs. comparative size rectangular or flexible duct.Static Pressure Drop in Pascals: 15 l/s = 13.60 Pa - 30 l/s = 23.50 Pa - 60 l/s = 43.60 Pa.Easy to install and durable, just push-fit duct and fittings together.For permanent fixings, seal joints with silicone sealant or tapeWill join any Female part of the Kair System 150 range.Built to last out of high-quality white Polystyrene/Polypropylene plastic Material.Max / Min Temperature: +60c / -15c. Suitable to use in compliance with Part F Building Regulations.Search for Kair Ducting for the full range of compatible Round and Rectangular fittings, outlets, and grilles.