This SMOK Helmet coil @ 0.4 Ohm is also a must have with the SMOK KOOPER MOD BOX KNIGHT KIT. Per packet comes with 5 x original replacement OEM coils. It can support a range of coil resistances. The Fused Clapton Dual Core coil is for lower wattage and more Vapor from 20W – 45W, if you want it, from 0.4 ohms in the available and adjusted set up this HELMET -CLP 0.4Ohm will do the trick. Just remember to set up your device for temperature control!