Specification:
Material: hollow paper
Outer ring diameter: about 17 mm/0.67 inches
Inner ring diameter: about 10 mm / 0.39 inches
Color: red, green
Packing quantity: 50PCS red battery insulator tape, 50PCS green battery insulator tape

Feature
18650 Lithium Battery Insulator Rings have good insulation, corrosion resistance, tear resistance and abrasion resistance. Safe and stable, better protection, avoid battery short circuit, easy to peel and stick.
Before using insulating paper, make sure the surface is clean, dry and free of grease.

Note:
Before using insulating paper, make sure the surface is clean, dry and free of grease.
Due to manual measurement, please allow an error of 1-2mm. Thank you for your understanding.