I bought this carb cap a few weeks ago for a 20mm Liger I had on order. When the Liger arrived I tried the carb cap and it didn’t fit. So it’s still brand new and never used except a few moments sitting on top of a clean Liger banger. I’m very disappointed as this is a beautifully made cap and I really wanted to use it. The XL Riptide cap measures 17.75mm across so the inside dimensions of your banger need to be at least 18mm or more. Gordo says it “Fits XXL QCB's and Evan Shore XL Bangers. Fits most XL bangers on the market but we cannot guarantee fit on other nails.” Asking $80 shipped within CONUS…Paypal preferred.