Features High anti-bacterial protection Additional Information Made with plastic material for medical use called transparent laminated film from polyester “corona treatment” and polypropylene without cover and by certified kraft paper studied to ensure high anti-bacterial protection. The inks used are ISO 11140 certified, water-based and non-toxic, with a clear color change: VAPOR from Pink to Brown EO Blue to Yellow / Brown Violet to Green FORM It is necessary to use a sealer to seal the sterilization sleeves.