Whirl-Pak Speci-Sponge Environmental Surface Sampling Bags (qty: 100)Swab work surfaces, equipment and animal carcasses for microorganisms including food pathogens using the Whirl Pak Speci Sponge Environmental Surface Sampling Bags. The Whirl Pak Speci Sponge Environmental Bag comprises of a dehydrated cellulose sponge swab packed inside an Nasco Write On Whirl Pak 18oz Bag. The special dry sponge is free of bactericides and has been tested to be non inhibitory. Easy closing twist Trusted puncture proof closure tabs