The junction boxes in this series are used as enclosures for electrical equipment for interruption and protection, junction, control and signalling, and interface unit functions. They are supplied with a base plate and wall-mounting feet. The GUB/H-I series features a heat-resistant tempered glass inspection window.

Material: cast iron body and lid, stainless steel screws and nuts.
Finish: galvanisation.
Coating: external epoxy RAL7037 grey, internal anti-condensation RAL2004 orange.