Personally, I do not like the IDK's why, but I never did. That told me she was leaving me. For purpose = Fiber for SD / HD = Tritium. All of my are night spots. Night views have a half-life, but depending on the manufacturer, some will replace them for free at this time, keep in mind, I think it's just a guaranty policy for the non-aftermarket manufacturer. It may be wrong.
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