Underground Enclosure Assembly Style - Underground Enclosure PG Cover Logo Traffic Signal Usable Interior Length 17 in Usable Interior Width 10 1/8 in Usable Interior Height 10 1/4 in Overall Length 20 1/4 in Overall Width 13 3/8 in Overall Height 12 in Cover Bolt Type 2 Stainless Steel Hex Head bolts 3/8-16 x 2 1/4 Load Rating - Underground Enclosure 15 000 lb