*First let me say that not every car needs them so make sure your car needs them or else the prints may be affected. If your machine suffers from "salmon skin" this may help. I have purchased these for a few machines and have seen immediate results on machines that have suffered from severe salmon skin. The stepper motors are quieter and the salmon skin has completely disappeared on subsequent prints (Especially recommended for Alfawise U20). However, unless your machine suffers from salmon skin, I wouldn't use it. I tried it on another printer that worked fine, hoping to see even better prints. Unfortunately, this caused printing problems, and I have since removed them from this machine however this is great for solving some print quality issues like salmon skin but not necessary for a machine that already prints well with no quality issues.
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