To fit the Aspire Cleito Tanks.

Aspire Cleito Dual-Clapton Coil (5 pcs) 0.4ohm (40W to 60W)
Aspire Cleito Dual-Clapton Coil (5 pcs) 0.2ohm (55W to 70W)
Aspire Cleito Kanthal Coil (5 pcs) 0.27ohm