A sterile hydrogel polymer sheet consisting of 89.5% water in a 10.5% cross-linked polyethylene oxide matrix. It is backed with an inert low-density film that controls water vapor transmission during storage and makes the gel easy to handle. It has a high specific heat to provide a cooling effect, is hydrophilic, and will absorb three times its weight in blood, serum or water. Size: 4" x 4"
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