The GeekVape F201 Fused Clapton 2-in-1 rebuildable vape coils are designed for use with a range of rebuildable atomisers, including RDAs, RDTAs and RTAs. These coils are recommended for advanced users only. Each set comes with two types of Fused Clapton, the 0.25 Ohm uses two Kanthal core wires and the 0.3 Ohm features three Kanthal core wires. Both kinds feature an N80 NiChrome wire wrapped around the Kanthal. Nichrome has a lower resistance per length compared to Kanthal for faster heating, ideal for cloud chasing. We recommend pairing these coils with high VG e-liquid, that is 60% VG or higher. Specifications: GeekVape rebuildable vape coils 0.25 Ohm / 0.3 Ohm Fused Clapton build Fast heating Compatible with high VG e-liquids What's in the box: 4 x 0.25 Ohm Fused Clapton Coils (24G x 2 & 32G) 4 x 0.3 Ohm Fused Clapton coils (26G x 3 & 36G)