PDL 683 come complete with: 3 x Switch Module (681M20) 1 x 3Gang Grid and Cover Plate (683VH) . PDL 600 Series were designed and engineered locally in Christchurch, taking into account the specific needs of New Zealand and Australian homes and building. . This 600 Series switches uses grid plates that allow up to 6 switch modules to be installed on each plate and are complete with a high quality plastic cover plate which conceals all fixings. . The switch modules are front mounted for safety, they cannot be pushed backwards into the wall box accidentally. . The plastics used in 600 Series are recyclable so once no longer required, need not place a burden on our landfills.