Phase Change Cooling Insert Set, PK4

Phase Change Cooling Insert Replacement Set, Style Cooling Inserts, For Use With Vests, Compatible with Series 6626, Compatible with Brand TECHNICHE, Compatible with Manufacturer Model Number 4531, 6627, Cooling Method Cold Pack Inserts, Activation Method Ice Water, Maintains a constant temperature of 65 Degrees F (18.3 Degrees C) for up to three hours when activated in a refrigerator or ice chest for 20-30 minutes, Maximum Cooling Time Up to 2 hr, Overall Length 12 1/4 in, Overall Width 6 in