WBT YellowDuct horizontal crosses can be used to provide a cross intersection in a straight duct. Reduction crosses join horizontal duct of different sizes.
WBT P/N: TC1279-61AHorizontal cross, 220mm x 100mm (with cover)
WBT P/N: TC1279-61Horizontal cross, 220mm x 100mm
WBT P/N: TC1279-65AHorizontal reduction cross, 220mm x 100mm to 100mm x 100mm (with cover)