Blood Type Patches - Mil-Spec Monkey MEDICAL (O NEG) Choose Blood Type in Dropdown High Quality Embroidery Velcro / Hook Fastener Sewn on Back Size in Inches: 2 x 1 You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!