Marco Bench Trunking is made of aluminium with uPVC centre lid, end caps and joint covers. Marco Bench Trunking is also available in individual and back-to-back units, coming in one, two, three and four gang units, all available and supplied to order. For the convenience of the installer, Marco’s bench trunking units can be supplied pre-assembled. Bench trunking units are available with a combination of socket box configurations including one gang, two gang or combined one and two gang units.