Packaging method of calculation:To find the size you need, measure the widest cross-section circumference of your pack and then divide it by 2 .Use the shrink wrap size at least 5mm (1/5 inch) wider than your half circumference value.This specification pvc heat shrink tubing suit for packaging the 4x18650 battery square packaging, 3x18650 in parallel packaging, and AA Battery pack.Our shop also has other pvc heating shrink tube for multiple batteries, details please contact customer service.The Battery is not included.
