EXPAND-O-FLEX

BELLOWS TO COVER LARGE OPENINGS CONSTRUCTED IN BUILDING ROOFS AND WALLS TO ALLOW FOR SEISMIC AND OTHER MOVEMENT; FLEXIBLE CLOSURES TO WEATHERPROOF PENETRATIONS THROUGH TO ROOFS AND WALLS BY DUCTS, VENTS, CONVEYORS, INTERBUILDING WALKWAYS; AND FIRE-RESISTANT CLOSURES USING A SILICONE IMPREGNATED WOVEN FIBER GLASS BELLOWS