Professional manufacturing, do not need to be replaced frequently, it is very safe to use. These faucet adapters are manufactured with copper material that can serve you for years without damage. The faucet adapters can be installed in your kitchen sink or garden hose. Features -Color:Assorted Color -Material:Copper,Stainless Steel -Size:2.10X2.00X2.00cm/0.83X0.79X0.79in -Size:2.30X2.20X1.30cm/0.90X0.86X0.51in -Size:2.20X1.90X1.30cm/0.86X0.75X0.51in -Size:2.20X1.70X1.30cm/0.86X0.67X0.51in -Note: 1/2 inch outer thread to outer 22mm, internal thread 18 to outer 22mm, internal thread 20 to outer 22mm, internal thread to outer 22mm -Made of sturdy copper, these sink faucet adapters are with nice rust and corrosion resistance. -Our adapter kit is suitable for both faucets with detachable sink aerators and cache aerators. -Fine workmanship with precise thread to reduce leaks and withstand rust, daily wear. -Fit for sink sprays, water aerators, water filters, sprayers, garden hoses, and more. -These are different sizes for these aerator adapters, which can meet your different needs. Package list: 1 x Set of Faucet Adapters