Stahlin Enclosures RJ1210HPL Junction Box Type 4x (fiberglass)
Preowned I don’t think this was ever mounted to anything still in very good condition.
Interior dimensions are 12”t x 10”w x 5” d
Has 3 holes in the bottom (pictured) 2 - 1/2” 1 - 3/8”ish
Has manufactured date of 2004
Selling surplus inventory.