Material: PVC Net Weight: 67g Main Color: Black Flat Width: 70mm/2.8" Round Diameter: 44mm/1.8" Thickness: 0.1mm Total Length: 2m/6.5ft Shrink Temperature: 80 Celsius Shrinking Rate: 48% Fit for: for 4 x 18650 Battery Pack 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. The Battery is not included. Package Content: 1 x PVC Heat Shrink Tubing Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.