Fire Door Gap Seal Overall Length 48 in Overall Width 1 7/16 in Overall Height 3/8 in Color Gray Flange Material Aluminum Flange Thickness 1/16 in Flange Width 1 7/16 in For Use With Fire Doors Includes #10 x 1 in Stainless Steel Sheet Metal Screws UL Fire Rating UL10B UL10C Insert Color Gray Insert Material PVC Insert Size 3/8 in Material Steel Projection 3/8 in Sold As Set Standards ANSI/UL10B ANSI/US10C NFPA 252 NFPA 80 Stays Flexible to -60 Degrees F