Extendable Enclosures Extendible enclosures are designed with perfection and have the flexibility of adding up additional components and systems to existing or new systems. High-quality Galvanized SteelSmooth continuously welded seams without knockoutsIP-55 protectionEarthing studs on enclosure and doorCNC-formed in-place Polyurethane GasketsRemovable gland platesWelded brackets for enclosure mountingHinges with maximum opening angles