Blood Type Patches - Mil-Spec Monkey MULTICAM (O NEG) Blood Type Velcro Patch - MULTICAM (O NEG) Size: 2 Inch x 1 Inch Hook Velcro Sewn on the Back 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!