Prewrapped Nichrome/Silica Coils
These generic coils with silica wick use very fine wire and are typically used for simple rebuilding projects where the source wick material was silica, like Kanger single-coil heads, or for higher-ohm single or dual-coil builds on devices which can't handle sub-ohm loads, like the iStick 20W.
Each pack contains five pre-wicked coils.
Silica's main advantage is that it can't burn, so is more forgiving of dry burns, but many prefer the improved wicking and perceived safety benefits of organic cotton. We aren't doctors and haven't assessed either the health claims or concerns.
Please note that all coils and wicks are advanced user products, intended for folks who understand the risks inherent in building/rebuilding e-cigarettes, including fire/electrical safety and also health risks.