Advanced Drainage Systems Sump Pump Well Liner is a heavy-duty solution molded from strong yet lightweight high-density polyethylene plastic. This liner is completely corrosion-proof and resistant to acid, alkali, and frost, ensuring it will not crumble, break, or rust over time. It features three preformed inlet collars that easily accept corrugated lines from inside the basement perimeter or floor drains, snapping on quickly for a secure fit. A specially molded panel on the side of the sump, designed to face the basement footer, allows for the attachment of the outside basement perimeter drainage line at the desired height. The liner measures 19 inches in diameter and 24 inches in height, providing a durable and reliable option for sump pump wells. Please note that the lid is not included but fits inside the top diameter of the sump. Model Number: 1524ADL