Description DICKINSON MARINE 3″X 22″Pipe W/Barom.Dampner – 16-001 Barometric damper helps reduce excessive draft on longer chimney systems Allows efficient operation at lower fuel settings Designed for use as the first section of pipe above the heater or stove Features a 1″ crimp on the side for secure connection Constructed from 304 stainless steel, size: 3″ x 24″