Firestop Plug, Fire Rating 2 hr, Fire Resistance Type Fitted Barrier, Firestop Type Plug, Interlocking Not Applicable, Overall Height 3.13 in, Overall Length 2 in, Overall Width 4 in, Color Maroon, Features Enhance Cold and Hot Smoke Seal, Works with 2 in Dia 3M Fire Barrier Pass-Through Device to Help Prevent the Spread of Smoke and Fire, Market Commercial, Plug Diameter 2 in, Standards ANSI/UL 1479, ASTM E413, ASTM E814 (UL 1479), ASTM E84 (UL 273), ASTM E90, CAN/ULC-S115, Package Quantity 4