Sponsored https://www.ebay.com/itm/358729037655?_skw=Boat+Parts&hash=item5385eab757%3Ag%3AoeAAAeSwQMRqQC-A&mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5339165021&customid=&toolid=10049
Safety Vented Marine Battery Box for Group 24 Batteries - Acid-Resistant
$19.78
safety ventedmarine batteryfor groupbox
https://pubchem.ncbi.nlm.nih.gov/patent/EP-0262070-B1
Modified safety vented cover for sealed container and method of manufacturing same - Patent...
EP-0262070-B1 chemical patent summary.