L2-D18 Battery Tube Fits L2, L2m, L2n, L2T, L2P, L2C, L2D Works with M3, M3s, K3 Works with any L2 series Switch L2-S6, L2-S8, L2-S10, L2-S11, L2-S12, PTS-2, PTS-3 Extension Tube, for multiple battery configuration