The Aspire Flexus Blok replacement pod will hold 2ml of e-liquid and is compatible with the Aspire Flexus Blok kit. This pod uses the Aspire Flexus AF coils, which will create either a RDTL (Restricted Direct To Lung) or MTL (Mouth To Lung) inhale. The Flexus Blok replacement pods use push fit coils meaning there are no messy coil changes. The Flexus Blok replacement pods are reusable which will save on money and reduce plastic consumption.