Cast aluminium gutter external 90 degree angles are fitted in a cast aluminium guttering system where the run needs to go around external corners of a property. We recommend fixing a fascia bracket 150mm away from each angle in an aluminium guttering system.Please Note - Supplied in Matt RAL 9005 Jet Black as standard - Satin and Leatherette (Textured) also available for the same price - please contact us if these are required.