The Wavin Osma RoundLine OT004N 45° Gutter Angle (Brown, 112 mm) is a premium half-round corner fitting, engineered for tight directional changes in domestic rainwater systems. Designed for 112 mm RoundLine guttering, this 45° angle allows you to negotiate eaves, bay windows, or other architectural features with a smooth water flow. Made from durable UV-stablised PVC-U, it features a Flexiclip seal joint that ensures a secure, watertight connection while accommodating thermal expansion.