The Wavin Osma RoundLine OT044B Gutter Spacer Bracket in black is a high-quality PVC-U component designed to provide a 21mm projection, ensuring optimal alignment and support for 112mm RoundLine half-round gutter systems. Ideal for domestic applications covering roof areas up to 163m², this bracket is compatible with RoundLine, SquareLine, DeepLine, StormLine, and SuperLine brackets.