1) I'm an average IQ woman who looked at valve stem caps for about 15 minutes before choosing them because they were beautiful. I read many reviews on a number of different caps in that 15 minutes and no one mentioned a fuse or other issues. In fact, they all seemed pretty and pleasantly versatile. Here's a car part I can order correctly without Jack knowing anything about cars! Now I see that there are all sorts of stuck warnings on this product - I'm pretty sure they weren't there when I bought them. I can be wrong, but I will never admit it. 2) I'm very glad I only missed one. 3) I don't know what they are for, but they are not for 2013 Ford Escape tires (4 cylinder). , AWD).4) I thought it was a fair price for what they were. However, if I had known that I would have to work with it every month, I would never have bought it. I would pay $20 each not to touch the outside of the car in a Wisconsin winter. (Bring back full-service gas stations!) The whole point of my purchase was not to inflate the tire with air from a slowly leaking valve. Rod because it had no cap when it was 30 below zero. 5) I'm curious how much it will cost me. Stay tuned for updates after your next oil change.