Kair 125mm / 5inch Plastic Ducting 90 Degree Elbow Bend Joint 90 degree bends can be used to run your ductwork around obstacles along walls and into ceilings and offers superior performance and durability over flexible alternatives. White plastic 90 degree elbow bend male spigot will fit inside 125mm Round Pipe Part: DUCVKC267 or 127mm Flexible Hose Part: DUCP0092/127/35. Recommended usage We always recommend to use as few bends as possible in your duct run to reduce any loss of pressure, this also applies when connecting smaller to larger ducting. When supplying air through a powerful fan, ensure that the ducting is not too narrow as this could lead to an increase of air noise, damage to the fan and potential vibration. Static Pressure Drop in Pascals: 15 l/s = 5.60 Pa - 30 l/s = 21.10 Pa - 60 l/s = 33.10 Pa. Easy to install and durable, just push-fit duct and fittings together. Max / Min Temperature: +60c / -15c. Will join any female part of the 100mm ducting range. Airflow performance independently tested by BSRIA or BRE. Suitable to use in compliance with Part F Building Regulations. Built to last out of high-quality white Polystyrene/Polypropylene plastic Material. Kair plastic ducting is lightweight, durable and suitable for commercial and domestic use. It is perfectly suited for ducting your tumble dryer, bathroom or kitchen extractor fan, hydroponics, in-line extract fans, or cooker hood. It can be used as a part of a long ductwork run for a variety of purposes including whole house ventilation, passive stack vent, positive input, air conditioning, HVAC, and heat recovery systems.