The SMOK Helmet Nano Replacement Coils offer optimal vapor and flavor with their Fused Clapton Dual Core construction. Available in two resistances (0.4Ω & 0.6Ω) and suitable for wattage ranges of 20-45W and 15-35W respectively, these coils provide the perfect balance for your Helmet Nano Tank, OSUB 40W Mini Kit, or OSUB One 50W Device.