Johns Manville's Zeston® 300 Series PVC fitting covers are made from a thick gauge material that provides superior impact resistance and increased durability for high abuse areas in industrial and commercial applications. Zeston 300 Series PVC fitting covers are manufactured from a glossy, high-impact, UV-resistant material. Our wide range of products and accessories enable the contractor to design, fabricate and install a complete system with a quality finished appearance. When combined with JM's PVC jacketing and solvent welding adhesive, our PVC fitting covers form a completely sealed system that meets USDA and FDA requirements for applications in food, beverage and pharmaceutical facilities.