【New, Unused】 GROHE Genuine Water Faucet Connection Joint Adapter (2 pieces) 【Free Shipping, Same-Day Dispatch, Anonymous Delivery】 This is a connection joint adapter part that was included with the GROHE Eurosmart Cosmopolitan mixer faucet. This adapter is suitable for faucets with a G3/8 end. Please note that this adapter may not be compatible with all GROHE faucets! The male thread is G3/8 (outer diameter approx. 14mm), and the female thread is G1/2 (inner diameter approx. 19mm). Material: Brass Plating: Nickel plating There have been many cases where installation was not possible due to insufficient confirmation of the screw size. Please double-check the screw size. No returns or exchanges accepted. We are also listing this item on other sites, so in the unlikely event that it is purchased on another site first, we appreciate your understanding.