Specification: Needs 5/8 inch or 16mm diameter opening to install. Fits dispenser wall up to 11/16 inch or 17mm thick. Material:304 Stainless steel. Thread Pitch: 1.25MM/0.05 inch. Package includes: 1 x stainless steel spigot; 2 x stainless steel washer; 2 x silicon gasket; 1 x stainless steel nut; 1 x Anti-Clogging Cap; Installation Steps: 1.Remove the Anti-Clogging Cap from the spigot; 2.Put a metal washer on the spigot; 3.Put a silicon gasket next to the metal washer; 4.Put the half assembled spigot through the hole of the dispenser; 5.Take another silicon gasket and put on the spigot from the inside of your jug/vessel; 6.Add another metal wash behind the gasket; 7.Put the nut and tighten it slowly; 8.Put the Anti-Clogging Cap on the end and tighten it. (Please avoid over tighten if your dispenser is glass) Kindly Remind: 1. Make sure the Mounting Hole Size before purchasing. 2. Before installation, wash the stainless steel spigot in soapy water and rinse suggested . 3. Do not over-tighten, it could the dispenser made of fragile material like glass or ceramic. 4. If used for sugary drink, we suggest that remove the spigot from the dispenser and clean thoroughly.