Material: ABS M16.5 External Thread, Beam Regulator Diameter: 16.5mm. Our air vent unit can easily replace the old, clogged or broken beam controller. Make water flow smoother, reduce buffer performance, filter contaminants and save water. Water saving of almost 30 to 40%: The faucet aerator can completely mix the flowing water and air to form a foaming effect, improve the abrasion force, and thus reduce water consumption. A faucet with an aerator installed saves about 30-40% more water than a faucet without the device. Splash proof, noise canceling, constant current: After the water flow mixed with the air, it will become softer and reduce the impact force, it can prevent water from splashing everywhere when the water is taken out. So the sink faucet filters can also reproduce good constant water flow and noise reduction effect. According to the different water quality in the area, for disinfection and water safety, it is recommended to replace the bubbler directly every 3-6 months. Packing list: You will receive 1 faucet aerators and 1 key.