These little brackets are used to create a professional and neat way of keeping your 18650 batteries together. They are joined in an interlocking way as can be seen in the image below.
Specifications:
Material: Plastic
Size: approx. 22 x 22mm (LW) for 1 Cell
approx. 66mm x 22mm - for 3 Cell
Inner Diameter: approx. 18.4mm
Color: Black