Cherne Kwik-N-Sure Plug 2-1/2" Hex Bolt Style, Zinc Plated

The smaller sizes of these mechanical pipe plugs can be inserted in lid holes from the bottom side of the lid to reduce manhole infiltration. 3/8" to 1-1/4" wing nut, 1-1/2" to 5" hex bolt. Natural rubber with zinc plated steel.