It is a nozzle head. It can create a visually appealing effect. Ideal for garden fountain spray irrigation, watering, and similar applications. Produces a striking vertical water column with air bubbles, creating a white jade-like appearance within its spray range, enhancing water display and landscape aesthetics. Material: Copper Specifications: D15: Connection Diameter: 0.5 inch Total Length: Approximately 35 mm / 1.38 inch Outlet: 3 mm / 0.12 inch Working Pressure: 75–250 KPA Water Flow Rate: 0.8–1.8 M³/h Spray Height: 1.0–2.3 m Coverage Diameter: 1–2 m D20: Connection Diameter: 0.75 inch Total Length: Approximately 40 mm / 1.57 inch Outlet: 4 mm / 0.16 inch Working Pressure: 100–300 KPA Water Flow Rate: 1.0–2.3 M³/h Spray Height: 1.0–2.8 m Coverage Diameter: 1.5–3 m D25: Connection Diameter: 1 inch Total Length: Approximately 50 mm / 1.97 inch Outlet: 5 mm / 0.2 inch Working Pressure: 100–400 KPA Water Flow Rate: 1.0–3.0 M³/h Spray Height: 1.0–3.2 m Coverage Diameter: 1.8–4 m Package Includes: 1 Piece Frothy Fountain Nozzle Note: Due to lighting and screen setting differences, the item's color may vary slightly from the images. Please allow slight variations in dimensions due to manual measurement. Thank you for your understanding.