Door Bottom Brushed Stainless Steel Finish Insert Size 1/4 in Flange Height 2 in Width 1 3/4 in Length 48 in Projection 1/8 in Insert Material Intumescent Neoprene Housing Material Stainless Steel Color Gray Performance Heavy Duty Insert Color Black Housing Thickness 1/32 in Flange Material Stainless Steel Flange Thickness 1/32 in Hardware Included For Use With Doors Standards ANSI/UL10B ANSI/UL10C NFPA252 NFPA80 UL Fire Rating UL10B UL10C