Top air-inlet system and top air-flow control
system to minimize
leakage and condensation
Knight 40 Kit is compatible with all 7 S-series coils.MTL,RDL and DL all are available
3 new upgraded S-4，S-5 and S-6 coils are perfectly suitable for Knight 40 output to meet all your needs
Only by removing the cartridge and fill it,then put it back in place. The cartridge is perfectly aligned with the device with strong connection.