These are the replacement coils for the Uwell Crown 2 sub-ohm Tank. They feature large juice ports, improving the wicking process which allows you to push more wattage through them.
Specs:
SUS316L Parallel Coil 0.25ohm - Recommended Wattage: 60-100W
SUS316L Parallel Coil 0.5ohm - Recommended Wattage: 50 - 80W
Kanthal Parallel Coil 0.8ohm - Recommended Wattage: 35 - 55W