These are the replacement coils for The Squid RDA. Approximate resiatnce is 2.0 ohm. They are easy to replace via the thumb screws used to connect them to the device.
The coil assembly slides out of the tube from the bottom. So after removing the coil assembly, a twist of the thumb screws to loosen, uncoil the wires from the posts. and remove the coil. To install the new coil thread the wires through the holes on the posts, wrap them around the posts just under the thumb screws and tighten by hand. Then insert the coil assembly into the tube and you are ready to vape.
There is no warranty on cartomizers, atomizers or coils.