This battery spacers and holders are made for 18650 Li-ion batteries. They are made of flame retardant ABS+PC materials. The holders have features like high temperature resistance and crake proof. Every single battery requires 2 spacers, one on top side and one on bottom side of the battery. They gives the flexibility to connect in with any required number of cells, as it has a slots on the edges to connect with an additional spacer. This is the best choice if you want to make your own battery pack.

 Specifications:

Material: ABS
Color: Black
Advantage: Makes your battery pack Solid and Reliable!

Size: 21.7x21.7x8.8mm