Alcohol Tobacco & Firearms (ATF) Hazardous Devices School patch. Located in Huntsville, Alabama. This round Bomb School patch is 4 inches tall and 4 inches long. The second scan shows the BACK of this patch. IF YOU WIN OR BUY 1 PATCH, OR 100 PATCHES, MAKE ONE SINGLE PAYMENT AND I WILL SHIP YOUR ORDER FOR $1.00 (International Shipping is $1.80).