Segmented ventilation elbow is made of galvanised steel sheet, 0.7 and 0.9 mm in thickness.
Available standard BSQT bends:
BSQT-...-90-...- bend 90˚
BSQT-...-60-...- bend 60˚
BSQT-...-45-...- bend 45˚
BSQT-...-30-...- bend 30˚