Yocan Evolve Plus XL Quad Quartz Coil This is the replacement coil for the Yocan Evolve Plus XL Quad quartz coil. The coil features the all new QUAD coil technology that uses four quartz rod heating elements to give you big an eNail like hit. The coil does not come with a coil cap. In The Box: - Yocan Evolve Plus XL QUAD Coil or Coil Cap