The Smok V12 Prince coils are for the Smok TFV12 ‘Cloud Beast Prince’ only. Q4 Coil – 0.4ohm – Quadruple (40-100w / Best 60-80w). M4 Coil – 0.17ohm – Quadruple (30-70w / Best 40-60w). We have Codes on all our coils which can be checked before use.