Superior 5-inch Diameter Section Flex Pipe - 20 1/2" - 44 1/2" Length PF58-12365 inch Diameter Section Superior Flex Pipe 20 1 2" 44 1 2" Length PF58 1236 Product Details This is Superior's 5 inch Diameter Section Flex Pipe, with a length ranging from 20 1 2" to 44 1 2", labeled as PF58 1236. Ensure flexible and efficient venting for your fireplace system with this adjustable length flex pipe component. Features Size: 8 Inches Color: Stainless Steel Flex pipe 5" inner diameter, 8" outer Flexes from 20 1 2" to 44 1 2" This unit