The 1590Z series are available with standard black or gray powder coats, which provide a finished look that will not chip when holes are drilled or milled into the box. They may also be purchased without any finish. Unfinished enclosures carry all the same ratings as the powder coated versions and are perfect for applications where an alternative secondary finish is required. They may also be left unfinished when put into service as a finished product. The boxes and lids are assembled with stainless steel machine screws which become captive (will not fall out) the first time they are screwed into the lid.