Crosstex: Sterilization Pouches Sure-Check 12x15 - SCL12152Sure Check Self Seal Sterilization Pouches Built in multi parameter internal external process indicators that change colour when all three criteria for sterilization have been met time, temperature and pressure Manufactured from medical grade paper Thumb notch for easy opening 6 corner tack seals to prevent curling and other potential contaminants from entering pouch upon opening Perforated fold to help ensure the adhesive strip forms an airtight seal