The Geek Vape Aegis Boost and Hero replacement coils offers five 0.6-ohm KA1 Mesh Coils geared for MTL use rated for power between 15W to 25W. Thanks to the mesh coils distinctive architecture that increases the surface area, the Aegis Boost Replacement Coils promote mesmerizing flavor profiles and intensely acute nuances. As well, these KA1 Mesh Coils are far more efficient than standard coils, requiring less power to achieve desirable performance.