TAG - Reclaim Adapter with Collecting Dish & Keck ClipPlease read carefully. The drop down menu has many options. The order in which the sizes are written is very important. For example: 14MM Male to 14MM Female Means this adapter physically has 1x 14MM Male and 1x 14MM Female joint The (1st Joint) 14MM Male joint connects to the pipe The (2nd Joint) 14MM Female joint is where you place your nail (in this example) If you are ordering a 14MM Male to 14MM Female, this means your oil rig has a 14MM Female