O Negative Patch
194+ items
![May include: A black rectangular patch with white embroidered text that reads "[AB NEG] BLOOD TYPE". The patch has a stitched border and is likely designed to be sewn onto clothing or bags.](https://i.etsystatic.com/64026008/r/il/846e16/7641406895/il_300x300.7641406895_9o3g.jpg)
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