There were no instructions to help me understand what was going on. My best guess was that the narrow end goes through the fan and the long end helps you pull it through the case. This rubber is very hard and I broke two trying to get through them. I put them in hot water for a few minutes to soften them up a bit and that helped a bit. This should help remove the fan from the case and reduce vibration as well as simplify installation. got one of two. Installation was difficult for the first fan. Should have read about it first or watched a video about it or something. Well, everything worked out in the end Review I order stuff with my own money that I earn with my work and time. I expect the products I buy to be worth my time and money. All items are evaluated on the product itself and not on an issue caused by me or the shipper (unless it's clearly a packaging issue). I try to give my unbiased and complete review to best help others in choosing where to spend their precious money. If you have any questions - please let us know!
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