See our other products Add to Favourite Shop categories Baby Automotive Electronics Home Improvement Kitchen Dining Home Kitchen Musical Instruments Office Products Toys Games Shop pages Home page See Our Other Products ThermoSafe U-tek 412 Phase Change Material Gel, -1C Temperature, 6.75" L x 4" W x 1" H (Case of 13). Product Specification Phase change formulas ideal for products requiring frozen temperatures or extreme cold that may not tolerate dry ice or CO2. Utek phase change materials provide thermal solutions for shipping temperature critical packages during transit. Available in a broad selection of styles and a multitude of sizes, they’re designed to provide reliable temperature protection for a vast array of products and packages. Features Laminated, metalized film exterior provides radiant heat barrier, resists punctures Reusable, non-toxic formula returns to gel state on thawing; structured gel formulation minimizes leakage Provides 15% longer protection than standard gel packs