Selkirk Inc Stovepipe Length 6To38 To 68In DSP6TL Telescoping Stove Pipe This DSP length is the ideal type to connect a wood burning appliance to a chimney system. This telescopic length can be 38 to 68 in. long and eliminates the need to cut pipe. Model DSP has an attractive outer black painted surface made of durable aluminized steel to withstand Materials - Stainless steel inner and Aluminized steel outer pipe