The No. 6291/8 nozzle has an extended1/8 tube that can deliver glue to precise spots such as along a fraying seam edge. The 0.085 inside diameter delivers a enough adhesive even for sealing large tufts such as Berbers. Attaches to either Crain No. 203, No. 204 or No. 207 Glue Guns or other guns with standard size thread. Thread size:7/16 major diameter- 20 threads per inch. In operation, this nozzle and melted glue are very hot, up to 400F. Users should avoid contact and keep out of reach of children.