I've looked into my 6 years old Mountain Bike manual and in the bag with it and all the warranties I found these 5 pieces of plastic, what are they made for?
Thank you in advance
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These are cable guide parts. From the looks of it, you have:
Many frames come with extras of these parts, so it may be that you have no need for them at this time. Or you might, if the LBS did a poor job of assembly. No way for us to know without seeing your bike.