E-XY Electronic cigarette 4 IN 1 Wire Prebuilt Coils Box kits Fortress Coil Violin Coil Centipede Coil Crack Coil For RDA Atomizer Each Box Contains 16 pcs coil as below: 4 pcs Fortress Coil:0.4*3+0.25mm 4 pcs Violin Coil :0.6*0.1+0.5mm 4 pcs Centipede Coil:0.4*0.2+0.4*2 4 pcs Crack Coil:0.4*2+0.1*0.4 1 pcs Organic Cotton