Automatically seals and drains self bailing decks. Made of polycarbonate material. Solid polyethylene ball and PVC seal mounts on transom above water line. 18271 and 18291 designed to retrofit Model 18261. Size Large Fits 1-1/2" - 3" openings Color Clear Fastener (6) #10

Price is per unit.Also available in a case of 12. Please call us if interested in case pricing.