You must be over 18 to purchase this product. We have an effective and monitored age verification process provided by VerifyMyAge. We will not sell to persons that do not meet the age restrictions for this product and by continuing with this purchase you hereby consent to the processing of your personal data for age verification purposes. VOOPOO UFORCE COILS U2 U4 U6 U8 N1 N2 N3 MESH PACK OF 5 AUTHENTIC GENUINE UK SELLER Uforce U2 Type: Dual Core Resistance: 0.4ohm Power Range: 40-80W Best Range: 55-65W Uforce U4 SMOOTH TASTE Type: Quadruple coils Resistance: 0.23ohm Power Range: 50-120W Best Range: 60-80W Uforce U6 UNIQUE TASTE, RICH FLAVOUR Type: Sextuple coils Resistance: 0.15ohm Power Range: 65-110W Best Range: 80-90W Uforce U8 RICH FLAVOUR, CRAZY VAPING EXPERIENCE Type: Octuple coils Resistance: 0.