Features:

Very simple to operation
Very felxible, it is easy to assemble any type battery packs
Strong flame retardant, its level reaches 94v-1
High quality, it can be reversed 720 degree and not break

Specification:

Product Name: 18650 battery spacer

Material:ABS or ABS + PC Environment Friendly

Configuration: 3x7 type

Diameter of the Hole: 18.4mm

Heigth: 8.89mm

Dimension: Can be customized as your requirement.

Usage: 18650 battery pack assembling