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Zero #770 is Our Best Selling Heavy Duty Adjustable Door Gasket. This high quality gasket provides consistent head and jamb protection. The solid neoprene bulb seal and neoprene interior create a high sound rated door gasket / weatherstripping product. The seal is easily adjusted with a screwdriver if the door or frame shifts over time. Available in four finishes and is custom cut to size, with an option of straight or mitered edges.