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_C N-1 <br />MANUF4CTURWG <br />MANHOLEST11OUND FILLBOXEStND <br />SPECIFICATIONS: <br />OUTER RING: Heavy cast iron. <br />COVER: 318" non-skid floor plate. <br />SKIRT: 14 gauge sheet metal spot welded and riveted to cast ring. <br />FEATURES: <br />• Reinforced cover is lightweight, yet rated to withstand 24,000 lbs. Lift handl <br />on all covers 24" and larger. <br />• All boxes requiring screwed down covers are equipped with 3/8"-16 alien flat <br />head screws. <br />• Tamper proof alien screws are available as an option. <br />• 1/8" recessed area to accept our Part N 290. <br />9 <br />19388 <br />