Hi-Temp Grease Duct Access Door   Hi-Temp Ceramic Fiber Gasket (2300oF, 1250oC) is permanently bonded to the outside panel of the access door to eliminate leakage   Leak resistant and consists of two layers of stamped, hot dipped galvanized steel and one 16.g black plate for ultimate safety and durability   Zinc plated conical springs between the inner and outer plates to facilitate opening   Easy to install   No measuring needed. Self-adhesive mounting template provided   Available with 6" break away mounting studs permit installations with fire wrap insulation   Studs may be broken at 2" for standard installations   Meets NFPA #96 Standards   Size: 18" x 14"