The official Aspire coils, much more reliable than the No Name ones sold by various stores for 4 euros and 5 euros.

However, it would be good if they lasted longer. A typical coil should last 7-10 days, but with frequent vaping, these often don't last more than 5. The situation is not helped at all by the low-quality circuit and battery of the Pockex device, which malfunction within just 3 months, resulting in giving more current to the coil and burning it even from the second day, making you wonder if the coil is faulty or if it is normal for it to last so little.