The 3x6 18650 Battery Spacer Holder is designed to hold 18 pieces of 18650 lithium-ion cells in a 3-row by 6-column arrangement. Made from durable, flame-retardant ABS plastic, it provides a snug 18.5 mm bore fit to ensure stability, insulation, and safety during battery pack assembly. The holder’s design allows proper airflow for heat dissipation and prevents short circuits, making it perfect for high-capacity battery packs in e-bikes, solar energy storage, and custom power projects.