HorizonTech

5-pack Arctic coils come with BTC (Bottom Turbine Coil) and BTDC(Bottom Turbine Dual coils) optional. BTC 0.5 ohm, BTC 0.2 ohm,BTC 1.2 ohm, BTDC 0.5 ohm,BTDC 0.2 ohm  100% organic cotton and 100% USA made kanthal wire. Work with 10 to 100W..