McKesson Hot / Cold Pack General Purpose Small 12 X 15 cm Gel ReusableHot Cold Pack McKesson General Purpose Small 4 3 4 X 6 Inch Gel Reusable McKesson cold and hot compress provides hot and cold therapy to relieve muscle cramps and inflammation. You can freeze or microwave the small gel pack to the preferred temperature. The 4. 75 x 6 inch gel pack conforms to contours around joints and other areas to provide adequate pain treatment. The pack is a gel consistency, even when it's frozen, to ensure it stays flexible. It