This FermZilla Flat Twister Lid is perfect for homebrewers who want to have precise temperature control during the brewing process. It's designed for FermZilla users specifically when they use the Temp Twister Cooling Coil and Thermowell together. The lid has 3 pre - drilled holes that fit the Duotight bulkheads of these accessories nicely. It also comes with a lid o - ring to ensure a tight and secure fit. While the exact size and weight aren't specified, it's a great addition to your brewing setup to help you achieve better results.