B240/20/4 Junction Boxes 4 Way 20mm All BOSS Rigid PVC Conduit and Fittings are manufactured in strict accordance with the British Standard BSEN 61386 - 21:2004/ IEC 61386-21:2002 Top quality, High Impact Polyvinyl Chloride is used to manufactured the conduit and Fittings. !! GROSIR !!