Due to our new supply contracts we have two vendors we get our supplies from. Each vendor has their own format for the cards so you may see two different bloodstain cards. Some of the older stock may still have barcodes on them but we here at AFRSSIR do not use barcodes for any type of identification. Each card meets all required specifications. Just remember that as long as you get your supplies from AFRSSIR they are good to use as is.