Starswab II® Specimen Collection and Transport System 6 Inch Length Sterile (1036929_PK) 50/PKSterile single rayon swab with plastic swab shaft comes with the additive Amies clear a modified Amies gel that provides excellent survival for a wide range of bacteria; compatible with Gram stain. Spiral media chamber keeps sample immersed and protected during transport. Shelf life is 24 months. Tube label shows code, lot number and expiration date. Tube is translucent with a magenta plug cap.