Source for Trit capsule for C01 / C01R?

Flashlight Modding and DIY Parts
1

Any suggestions for a source for Trit capsules to fit a Sofirn C01 / C01R?

I’ve got two C01Rs at home and four C01s on the way.

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Here

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I know FastTech also sells tritium vials, but I can’t attest to how good they are.
If you do buy from them, they’ve got a coupon code (BFCM15) for 15% off on Black Friday.