OneTigris Military Blood Type A/B/AB/O+ Positive Hook Patch - 2"x1" (O+);

Can be easily attached to your backpack, clothes, hats and so on, to tell your blood type obviously.

Material: Embroidery
Size: 2" wide x 1" high
Weight: 0.01 lbs

Package Content:
1x OneTigris Hook and Loop Patch