The VooPoo UForce and UForce T2 are both compatible with the VooPoo UFORCE D4 Replacement Coils. A quadruple coil made of Japanese cotton is included in each atomizer head for optimal taste and better wicking ports. The replacements have a quadruple coil rated 65–75W at 0.4 ohm. D4 replacements provide immediate heat as soon as your mod is turned on. To guarantee optimal taste, UFORCE replacements include a bottom vertical coil construction. Savor the exhilaration of a powerful Sub-ohm vaping encounter. VooPoo UForce D4 Replacement Coils are made specifically to work with UForce Tanks and have a vertical design.