20/100/500pcs 18650 Lipo Battery Wrap PVC Heat Shrink Tube Precut Width 29.5mm x 72mm Insulated Film Protect Case Pack Sleeving - AliExpress
18650 To 26650 Lithium Battery Converter Adapter High Toughness Plastic Li-ion Heat Insulated Pipe Tube Holder Fixed Bracket Fixture Case Switcher Storage Box - Temu
V1 18650 Battery Tube (SS)
Amazon.com: MINCHEN 6pcs 18650 Big Plastic Sleeves, Big Plastic Tube Holder for 18650 Battery, Battery Plastic Holder Converter for 18650 Battery to 26650 : Electronics
Uxcell 18650 Battery Protective Sleeve, Battery Tube Adapter, Battery Holder Converter for 26650 LED Flashlight 12 Pcs - Walmart.com
18650 Battery Protective Sleeve Tube Battery Spacer Holder Converter for 18650 LED Flashlight - Amazon.com