1 piece, The 24 mm threaded male aerator will fit your female thread faucet. High quality: the tap aerator is high quality brass top quality for fashion and durability . Adjustable Mode: The valve aerator can be set to 2 different water flow modes, simply turn the nozzle section to the left or right to adjust the flow of water Soft foam mode in shower mode. swivel tap nozzle: 360 ° rotation, it is ideal for the hand shower kitchen. Foam Faucet Eau Save: The tap aerator provides a low water flow, sufficient air bubbles to undermine power erosion by water and prevent splashes.