Designed for use with the Aspire Guroo tank, these replacement coils come in 0.15ohm and 0.3ohm resistance varieties with wattage ranges of 60-70W and 40-50W, respectively. Each pack contains three (3) coils to give you a reliable backup and peace of mind. Enjoy the versatility and convenience of these coils and don't let a burnt-out coil ruin your day!