Quartz Rods for the Win! The Yocan Evolve Plus Dual Quartz Coil is the perfect replacement accessory for all you extract enthusiasts out there. Not only does it offer a safe means of vaporizing waxy oil materials, but its quartz rods ensure that you get the purest and tastiest vapors around. And with its 510 threading, it's easy to use and perfect for both the inexperienced and the seasoned veteran. So why settle for less when you can have the best? Upgrade to the Yocan Evolve Plus Dual Quartz Coil and experience the difference for yourself!