The PAX Half Pack Oven Lid is an excellent solution for when you don't want to fill the oven of your PAX vaporizer all the way. You will be able to use less smoking material and still have it tightly packed inside the oven. This allows you to conserve your material and it's also great for a solo session. The PAX Half Pack Oven lid is compatible with both the PAX 2 and PAX 3.