Sterile For environmental surfaces to collect and ship microbial samples. All the advantages at a glance: 28 x 32 cm blue biocide-free fabric swab (swab cloth) Pre-moistened with 10 ml buffer In 55 oz.; 7.5 x 12" (19 x 30 cm) Twirl-Tie™ bag Bags can be opened easily with attached pull-tabs Label area for sample identification Irradiated for proven sterility Directions for use Romer Labs fabric swabs, also known also swab cloths, are pre-moistened with 10 ml buffer. The cloth is a blue, biocide-free, non-woven, wood-pulp/polyester fabric, measuring at 28 x 32 cm, folded twice and placed in a 55 oz., 7.5 x 12″ (19 x 30 cm) Twirl-Tie™ bag. Bags can be opened easily with the attached pull-tabs and include a label area for sample identification. Like all microbial sampling products, they are irradiated for proven sterility. Application NB (Neutralisation Buffer): Buffer that neutralises the effects of chlorine and quaternary ammonium compounds. Can be used on disinfected surfaces. Fabric swabs SurfACE™ NB ISO 18593