Puritan 25-83004 PD BS Puritan ESK Sampling Kit - 4ml Butterfield's Solution, Polyester, TubePuritan 25 83004 PD BS Puritan ESK Sampling Kit 4ml Butterfield's Solution, Polyester, Tube Sterile Environment Sampling Kit Pre Filled with 4ml Butterfield's Solution Packaging: 50 individually wrapped systems = 50 cs Intended for examinations of water as well as dairy, food, and pharmaceutical products For environmental surface sampling Easy edge peel packaging Quick turn leak resistant cap High quality Puritan polyester tipped swab Swab is securely