Description: 100% Brand new and high quality Joyetech Cubis BF Replacement Coil is made of totally imported SS316. It's applied to atomizer to go with not only TEMP SS mode, VW mode, VT mode but also TCR mode. #1: Resistance: BF SS316-0.5ohm DL(15-30w) #2: Resistance: BF SS316-0.6ohm MTL(15-28w) #3: Resistance: BF SS316-1.0ohm MTL(10-25w) #4: Resistance: BF Clapton-1.5ohm MTL(8-20w) Specifications: Material: Metal Color: Silver Model: Joyetech Cubis BF SS316 /Clapton How Often Should I Replace My Coils? It's very difficult to gauge how frequently you should change your coils, as there are many factors than can determine the lifespan of the coil. These rough guidelines should help: Heavy vaper, you will generally need to replace your coil every 5 - 7 days. Moderate vaper, your coils could last up to 14 days.