CatchMaster fly ribbons are the classic fly trap. The CatchMaster fly ribbons come 96 ribbons to each Box. These are individually bulk packed and not on a card. Catchmaster fly ribbons are easy to use and attract and eventually kill nuisance flies in commercial areas and other environments where flies are a problem.come 96 ribbons per case. Catchmaster fly ribbons are easy to use and attract and kill nuisance flies in many common areas including commercial areas and other environments where flies are a problem. CatchMaster Fly Ribbons are pesticide free and safe in all areas.