"Clevaflex" sewn sleeves are manufactured from a woven fiberglass laminated to aluminum foil. The laminate is folded in half and sewn along its open edge, creating a strong, flexible sleeve, the company said. The highly reflective aluminum, combined with the woven fiberglass, provides protection of components from radiant heat sources up to 1,000¿F. The sleeves are available in 11 standard sizes, ranging from 3/8-inch to 2 1/2-inch diameter. The sleeves can be provided on spools or in cut lengths, ready for installation. Clevaflex, 4081 W. 150th St., Cleveland, OH 44135; (216) 941-8742; fax (216) 941-6505.