Kair Rectangular 110mm x 54mm / 4 x 2 inch Flat Ducting 45 Degree Vertical (Upward) Elbow Bend. Both sides are female sockets. The ends will fit over 100mm ducting system 110mm x 54mm flat ducting pipe Part: DUCVKC249. Rectangular ducting is designed for short duct runs and it can be easily concealed due to its low profile. It is perfect for installations requiring low extraction rates such as bathrooms, toilets, and utility rooms. It can be flush fitted against ceilings and walls and can be concealed above wall units or inside ceiling voids. Static Pressure Drop in Pascals: 15 l/s = 2.57 Pa - 30 l/s = 12.72 Pa - 60 l/s = 62.99 Pa. Airflow performance independently tested by BSRIA or BRE Max / Min Temperature: +60c / -15c. Made in the UK using strong high-quality white polystyrene / polypropylene material. Installation Tips: Kair plastic ducting pipe is lightweight & easy to install. You simply push-fit the duct pipe and fittings together. For permanent fixings, you can seal the joints with a method of your choice (Popular options include silicone sealant, solvent cement, or tape). Rectangular plastic ducting can be carefully cut to the required size using a hacksaw. Offcuts are always useful to keep to hand for joining two female fittings together. If your duct run passes through a particularly cold area, we would recommend considering using our pre-insulated ducting to avoid condensation building up within your ductwork.