The PAX 3 Concentrate Insert Replacement Lid & O-Rings is a set complete with an oven lid replacement and five O-rings for use with the PAX Concentrate Insert. The products included in this set are essential for the proper functioning of your Pax 3 Vaporizer. This is an authentic Pax Labs product, Original Equipment Manufacturer (OEM), made by Pax Labs, meaning its functionality, durability, and compatibility with the PAX 3 Vaporizer is guaranteed. This product can serve as a spare or replacement for your Pax 3 Concentrate Insert.