Foam N’ Seal 8″ long plastic extension straw tubes for all FNS series foam dispensing guns. The 8" long flexible plastic extension tube extends the reach of the FNS series guns and is ideal for foam dispensing in hard to reach areas. Fits all major brands of foam sealant dispensing guns with a barbed brass nozzle tip such as the Great Stuff Pro 13. The extension tube is not designed to fit foam guns with a smooth dispensing gun tip. Sold in a pack of five 8" extension tubes.