Used Appleton GR Unilet CL I II GRP CDEFG 3/4 NPT Cross with 3/4 in cover HOLE

Description

This listing is for one (1) used Appleton GR Unilet.   The style is a cross pattern with 4x female 3/4 NPT and the cover has 1x 3/4 NPT threads.
These four Unilets have had a hole drilled through the back face
(please review photos to view the example but also be aware that the location varies on each unit).
The Unilets appear to be made of cast iron.  There is some rust present as these are used units.
The Unilet opening is right around 4.0 inches.  The cover is threaded on the 4 inch diameter for attachment to the Unilet.
The cover has text in the casting that I believe states 'CL I II'  and 'GRP CDEFG'.  I see other listings of other Appleton items that claim explosion proof and hazardous location usage.  I presume these designations spell it all out.
The reverse side of the housing has text 'GRUF'.
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