Environmentally friendly materials: made of PC material that meets environmental requirements, durable and long-lasting without harming the environment. Easy installation: direct replacement for old or broken nozzles; tool-free installation with no complicated procedures. High temperature resistance: suitable for civilian pools, including pools, massage pools and spa pools; withstands harsh water and conditions for long-term durability. Effective and relaxing massage experience: specially designed for pools, massage pools and spa pools; provides an effective, enjoyable massage to help users relax. Use scenarios: - Home pool retrofit: replace a worn nozzle to restore hydro-massage function and comfort in a residential pool. - Spa or massage pool upgrade: install in a spa or massage pool to maintain reliable massage performance in hot water. - Outdoor or communal pool maintenance: durable nozzle that tolerates high temps and harsh water for long-term, low-maintenance operation.