Propper* Chex-All* II Instant Sealing Pouches

These sealing pouches feature independent indicators on the inside and outside of every pouch and tube, to monitor the effective penetration of steam or ethylene oxide gas on the inside of the package. Self-sealing feature eliminates the need for heat sealing. Tamperproof. Hermetic seal will not open in steam autoclaves and is not affected by ethylene oxide gas. In steam, yellow indicators change to gray-black (red indicators do not change). In gas, red indicators change to green (yellow indicators do not change).