uxcell 2Meters 85mm Width PVC Heat Shrink Wrap Tube Blue for 18650 Battery Pack: Amazon.com: Industrial & Scientific
BLUE PVC Heat Shrink Wrap for Battery Packs Width 30mm-400mm (3 ft) - International Society of Hypertension
1M Battery Packs PVC Heat Shrink Wrap Tube Insulation of Width 85mm ~400mm for Big Battery Pack Power - AliExpress
MECCANIXITY Battery Wrap PVC Heat Shrink Tubing 70mm Flat 4m Black Good Insulation for Battery Pack: Amazon.com: Industrial & Scientific
50x75mm PVC Tube Insulation Film With Heat Shrink Wrap, Re Wrapping Film, And Sealing Sleeves Includes 2*18650 3.7 V Rechargeable Battery From Cheapezy, $0.08 | DHgate.Com