4″ x 24″ single-wall stove pipe. Pipe is made of carbon steel and painted black on the exterior. Includes a male (crimped) end and a female end. All joints on a stove installation should face female end up. This keeps and moisture or creosote inside the pipe instead of leaking out of the joints. Sections of pipe are secured with 3-4 self tapping anodized heat safe screws.