Imperial BM0124 Bm Pipe Stove Telescopic, 7"Highlights: 24 gauge, black Commonly used as a vertical section of pipe from the top of a wood stove Allows a solid one piece pipe to extend from the appliance up to the ceiling so that there are no joints One pipe is smaller in circumference than the other is so that the smaller pipe fits inside the larger pipe Pulling the smaller pipe up adjusts the length from 28" to 50" Eliminates need to cut pipe