Packaging method of calculation:To find the size you need, measure the 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 , and 18530 battery.All 18mm diameter batteries are suitable for. Our shop also has other pvc heating shrink tube for multiple batteries, details please contact customer service.Notice:The Battery is not heated when the tube is full shrinkable.and must not continue heat the tube, after it is full shrinkable.The Battery is not included.
