Features: -The waterfall fountain is suitable for most 1.5 inch / 5 cm threaded connections. -The height of the fountain stand and the spraying direction can be adjusted manually. -Easy to install: turn off the swimming pool pump, loosen and remove the return pipe connector, then install the fountain on the pond return outlet. -PVC material, corrosion-resistant, wear-resistant, durable. Specification: Material: PVC Interface inner diameter: 1-1/2inch (3.8cm) Interface outer diameter: 1.77inch (4.5cm) Colour: white Package Included: 1x Swimming pool fountain .