Sneaky Pete says:

Made of pure quartz, just like the original, the Quartz Deep Dish Replacement 2-Pack is great to have on hand in case yours show signs of wear and tear. It's also a good idea to replace your quartz dish periodically for best flavor and maximum efficiency. In either case, the Quartz Deep Dish Replacement will look good on your e-nail, and keep your vaping experience as pure as possible.