These original SMOK replacement coils are compatible with the RPM40 Pod Device. The 1.0ohm and 1.2ohm coils are designed for use with nicotine salt e-liquids, at power outputs between 8-16W, while the 0.4ohm and 0.6ohm coils are designed for use with regular salt e-liquids, at power outputs between 25W-40W. Each pack includes 5 coils.