Tfv4 Tf-n2 & Tf-ti Coils (5-pack)

What's included: 5 x replacement coils specs & features: tf-n2 standard core 0.12ohm: patented nickel 200 dual coil head temperature sensing capability & no burnt taste 0.12? (400?f-600?f) compatible with tfv4 tank tf-n2 air core 0.12ohm: patented nickel higher resistance dual coil head with 2 moreairholes 0.12? (20w-45w) compatible with tfv4 tank tf-ti core 0.33ohm: patented titanium dual coil head temperature sensing capability & no burnt taste 0.33? (450?f-600?f) compatible with tfv4 tank warning: this is an advanced item. Please use proper precautions and handling. Ni/ti coils are designed for use only with devices equipped with circuit boards capable of controlling coil temperature.