For M 36 Din-rail building block method With the advantage of the building block method you can flexibly build your own DIN-rail enclosures with the option of printed circuit boards with terminals on two board levels. The possibility of mixing single and double covers with different openings for connectors and with and without ventilation gives not only very wide options of connections, but also design wise it offers virtual custom specific enclosure/ designs. Due to designed covers it is possible to add different and individual features to the design. Interconnections in form of pin headers and distance pcs/spacers from board level to board level are available. Red, smoked, transparent lid and open front is available. Hinged lid and extended height is available upon request. Options: Printed numbers and symbols on the cover and colour coded covers.Series 157 is, if requested, available with customer specified holes in front, covers, panels and lid. Prototype PCB, customized label and packing are available.