Check the listing for details. Advanced Drainage Systems Nyloplast Ductile Iron 12" Cast Iron grate .. Condition: Open box. Listed at 139.99 USD. The Advanced Drainage Systems Nyloplast Ductile Iron 12" Cast Iron grate is a high-quality plumbing product designed for home improvement projects. Made by the trusted brand Nyloplast, this unit features a sturdy iron drop and a 12" cast iron grate, perfect for efficiently draining water in plumbing systems. With a lot of 3 units included, this product is ideal for larger projects or for ensuring a reliable drainage solution in multiple areas of the home.The Advanced Drainage Systems Nyloplast Ductile Iron 12" Cast Iron grate is a high-quality plumbing product designed for home improvement projects. Made by the trusted brand Nyloplast, this unit features a sturdy iron drop and a 12" cast iron grate, perfect for efficiently draining water in plumbing systems. With a lot of 3 units included, this product is ideal for larger projects or for ensuring a reliable drainage solution in multiple areas of the home.