SCHEDULE 40 PVC FSC TYPE BOX, DOUBLETopaz PVC products are strong and long lasting; fabricated for optimal safety during installations. Our double Schedule 40 PVC FSC Type Boxes accommodate standard covers and accessories. Recommended for through terminations. Manufactured with mounting feet for easy and secure installation. PVC construction maintains its integrity far longer than other materials and is highly resistant to corrosion from acids; cULus approved in 1/2”, 3/4” and 1” sizes.