It's a 35mm Blue PVC Heat Shrink Sleeve For Battery Pack. Heat shrink is one of the most effective techniques to seal your battery. It can protect your DIY batteries from short circuits, seal them against environmental factors, and give them a professional appearance. PVC heat shrink is ideal for use with batteries.
Specification
| Material | PVC |
| Diameter | 35mm |
| Length | 1 meter |
| Radial Shrinkage | up to 20% |
| Country of Origin | China |
