These Mesh Style Coils for the Wotofo Profile PS Dual Mesh RDA and Profile RDA & Profile Unity RTA & Profile M RTA are made specifically to be used in that RDA and rta, The Coil is made of Kanthal A1 Wire. These Mesh Coil Sheets measure 16mm x 6.8mm. The Coil Resistance is 0.3Ohms and the Power Wattage Range is 30W to 40W. The Mesh Style Coils 0.18ohm for Wotofo Profile RDA Atomizer is made from Kanthal A1 heating material in resistance of 0.18ohm, best performing wattage range from 40W to 60W. Wotofo Mesh A1 0.3ohm(NEW) Versatile For Series Or Parallel Builds Material: A1 Resistance: ≈0.30ohm Series dual build: ≈0.60ohm Parallel dual build: ≈0.15ohm Size:6.8mm*16mm Power Range: 30W-40W nexMESH Clapton S 0.15ohm Mixed and Maximized Performance Material: A1+Ni80 Resistance: ≈0.15ohm Unit:5pcs/pack Series dual build: ≈0.30ohm Parallel dual build: ≈0.08ohm Power Range: 55W-65W Classic Wotofo Mesh 0.18ohm Warm and Smooth Performance Material: A1 Resistance: ≈0.18ohm Series dual build: ≈0.36ohm Parallel dual build: ≈0.09ohm Power Range: 45W-65W ofrf nexMESH A1 0.13ohm Vigorous and Intense Performance Material: A1 Resistance: ≈0.13ohm Series dual build: ≈0.26ohm Parallel dual build: ≈0.07ohm Power Range: 60W-70W OFRF nexMESH SS316L 0.15ohm Clear and Soft Performance Material: SS316L Resistance: ≈0.15ohm Series dual build: ≈0.30ohm Parallel dual build: ≈0.08ohm Power Range: 50W-80W Fit for: Profile RDA & Profile Unity RTA & Profile M RTA Size:16*6.8mm Package: Simple Packing