Yocan Evolve Plus XL Coil Caps

The cap screws down over the XL's four-rod quartz coil and keeps concentrate where the heat is rather than letting it travel up the airway. On a quad coil there is more heat and more melted concentrate moving around than on a two-rod pen, so the cap works harder and wears sooner. Replacing a tired cap often fixes a pen people assume needs a whole new coil. Fits the Yocan Evolve Plus XL.