The Pelican MAN-20DB-A-CAL-NAL-6 is a complete 20 inch dry bulk manlid assembly with an aluminum cover and aluminum weld collar, hydrostatically tested to 47 PSI and rated for 30 PSI MAWP. It uses six quick-release cam lever hold-downs with zinc-plated hardware and nylon corrosion-resistant wear plates, and is built interchangeable with other industry-standard manholes.