All the ducting and accessories you need to put together a radial duct MVHR system.
Blauberg 204x60mm Flat Rectangular Adapter to 75mm
Blauberg 90° Degree Elbow Bend
Domus Adapt In-Line Adapter with 3xØ75mm Radial Sockets 220mm x 90mm
RD 75 Manifold Restrictor Ring (Pack of 10)