The advantage of using the Element enclosure system for your electronic products is that components can be fitted quickly and easily through the side-opening of the base.This makes it easy to access your electronic components for servicing purposes. Enclosures with air vents E...L are available to ensure optimal heat dissipation. In addition, front membranes and membrane keyboards using your special layout are available in the lid surface ( 1 mm recess ) of enclosure types E...F.Mounting bosses for self-tapping screws are provided in the base for fitting components, PCBs or mounting plates.The break-out keyholes in the base allow fast fitting to wall or machine surfaces ( not E 406 / E 408 ).Wall brackets are also included in the list of accessories.