2 cell battery spacer for building 21700 battery packs. Makes pack building easier and maintains an air space between cells. They can be interlinked to make larger packs or alternately the linking tabs can be trimmed off with a knife for a smooth edge.
There is room to run up to 10mm nickel strips between cells.
The fit is snug but proper.
Made of flame retardant plastic.
Package of 4pcs