Plastic

what is this piece of plastic? [duplicate]
How do you duplicate a piece of plastic?How do you mold plastic parts?How are plastic parts made?Can you cast plastic?Can you mold plastic?How much do...
Pieces of plastic that came with my bike, what are these?
What is the plastic thing on the rear bike wheel?What are bike parts called?Why are parts of a bike made from plastic?Should I remove plastic cassette...
Is the plastic piece between the seven gear sprocket and the spokes hard to replace, and how?
What is the plastic thing on the rear bike wheel?Should I remove plastic cassette guard?Is a spoke protector necessary?Should I remove dork disk?What ...