Unique peel-off indicator. Confirms heat penetration inside the pouch. No need to purchase secondary indicator strips. Affixes to patient file for permanent record of sterilization. Meets CDC requirements for placement of an internal indictor in each package. Dual external heat and gas sterilization indicators. Certified for a minimum 5 year, post-sterilization life! Aqua tinted, see through, four ply film allows to identify instrument set up and determine if sterility is compromised. Strong, medical grade paper that allows steam and gas penetration. Quality seals for added strength and a clean, fiber free peel. Easy to open overlap design. Wide range of sizes for all indications.