SEAFLO 4, 6 , 8 inch 180 degree open easy to install ABS plastic access hatches waterproof marine deck boat hatchSEAFLO manufactures the toughest Access Hatches, with a variety of sizes to fit an assortment of applications. We use an Anti-Aging, Ultraviolet-Resistant ABS Thermoplastic with robust reinforcement. Their rugged design provides performance that you can rely on for years.