Ford uses mini, micro-3, J-case and maxi style fuses so that makes it very complicated just to get a variety pack of 1 specific style with different amperages. They have 5A, 7.5A, 10A, 15A, 20A, 30A, 40A, 50A and 60A all of which depends on what options you have installed and whether it's a gas or diesel. There are probably over 100 fuses total in several compartments. Pull each one and determine the type and amperage, then take your most common ones and get several spares of those. One or two of a kind fuse size/types, you'll need to look what they do to determine if it is worth carrying a spare for some of those (if they shut down a critical function). Fuses that control the 'rain sensor', for example, are non-critical and you can replace those at your leisure, no spare needed. Anything to do with towing, lighting, brakes, engine, etc... very critical. At a glance you might see that you have 21 total of 20A fuses, but they might be 3 different styles. One helpful item to have might be a cheap plastic fuse puller (I need one, but never bothered to pick one up), they always give me a hassle because they are so close together. For ~$3-4, it's useful if you can find it when you need it.