Glowing Biohazard Warning Patrol Patch - 2" Round GLOW IN DARK Thread!! 2" Diameter Round Patrol Patch - Excellent Embroidered patch Image of the Biohazard Symbol! Black Twill Background / Off-White Merrowed Border (Border Does Not Glow) CHOOSE SEW-ON OR HOOK FASTENER (Hook Side Only) Free USPS First Class Shipping!