This 1x18650 Battery Holder is designed to securely hold a single 18650 lithium-ion cell, providing stability, insulation, and ease of assembly. Made from high-quality, flame-retardant ABS plastic, it ensures a snug fit with an 18.4 mm bore diameter. Perfect for DIY battery packs, it offers proper spacing for heat dissipation and reduces the risk of short circuits. Sold as a convenient pack of 2 pieces.