The Baby V2 S1 coil is made of Kanthal mesh, while the baby V2 S2 coil is made of NICKEL-Chromium, both of which are the custom-made coil for stick series battery, they work at lower wattage but with intense clouds and flavor. Baby V2 S1 coil has mesh inside making a good balance of cloud and flavor. Baby V2 S1 Single Mesh Coil, 0.15ohm, 40-80W, Best: 60-70W
