38 mm Clear, Perforated Heat Shrink Bands. These shrink bands will fit our 120 cc and 150 cc Vitamin Bottles and any other container with a 38 mm cap size. These also fit our 1 oz, 2 oz, and 3 oz. roll on bottles. You will need a heat gun or another source of high heat. NOTE: IF YOU ARE BUYING THESE FOR 38 mm CRC CAPS, they will not fit, as the CRC caps are much wider — please purchase the 45 mm shrink bands instead.