Pipe sleeve tops are specially molded from ABS acrylic, which provides a UV protection. Tops are strong and durable and can with stand temperatures up to 160 degrees Fahrenheit. Different size boots accompany each top depending on the selected size and quantity. Depending on the requirement, boots are available in different materials, such as molded weather resistance Plastisol, Epdm, or Silicon. Tops include pre punched mounting holes for convenient installation and can be installed on any style roof curb, canted, straight, or raised cant. Also available are curbs with multiple caps. Custom top and boot sizes are made to order.