20mm Black Galvanised Terminal Box - EACH Greenbrook have over 60 years’ experience when it comes to manufacturing electricomechanical products, so you know their products are high quality and reliable. It has adapted with the times, always meeting customers’ needs with their products. The Greenbrook 20B1 is a 20mm terminal box. It has a single hole and is made from black enamel. Product Box Type (Cable Baskets) Terminal Circular Material Steel Finish Enamel Colour Black Nominal Width 20 mm Standards BS EN 50086 Manufacturer GreenBrook Electrical