Uxcell 18650-Battery Protective Sleeve, Battery Tube Adapter, Holder Converter for 26650 LED Flashlight 4 Pcs - Walmart.com
SIDEWINDER EXTENSION TUBE, 18350 OR 18650
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 2Meters 85mm Width PVC Heat Shrink Wrap Tube Blue for 18650 Battery Pack: Amazon.com: Industrial & Scientific