30 in. enclosures; Made of ABS plastic; ABS construction reduces interference with Wi-Fi(R) signals; Universal hole pattern allows for most standard modules to be installed; 5 pack provides more savings; Enclosures conform to UL(R) Standard 2416, CAN/CSA STD C22.2 No. 60950-7-07, and are ETL(R) listed; Includes cardboard dust cover;Length: 32.60"Width: 18.40"Height: 12.00"