RYOBI Misting Kits and Accessories are the easiest and most efficient way to provide the cool, comfortable surroundings you want. The RYOBI 3-Pack of 6 in. Brass Nozzle Extensions offer customized cooling which extends each nozzle 6 inches beyond the misting line The RYOBI 3-Pack of 6 in. Brass Nozzle Extensions are constructed of high-quality brass and are designed to fit into any 10/24 threaded misting nozzle. These extensions are compatible with most 3/8 in. misting systems and can be used with a booster pump up to 160 PSI. This item along with all other Ryobi Misting Kits and Accessories is designed for outdoor use with cold water only.