0.5 ohm coil is a ceramic coil
0.3 ohm coil is just your standard coil
Keeping in mind that
the higher the OHMS e.g anything over 1.0ohm The less cloud, power, vapor and mouth to lung.
The lower the OHMS e.g anything under 1.0ohm the more Cloud, Power, Vapor and Direct to lung.
At Vape Freedom we sell all our coils individually not as a box set.
If you buy four coils you get the fifth coil free ?
This leaves you the option to be able to purchase 1 coil at a time or as many as you like.
Happy shopping and thank your for choosing Vape Freedom.