PAX Concentrate Insert Lid & O-Ring Replacement for PAX 3PAX Concentrate Insert Lid and O Ring Replacement A complete set with an oven lid substitute and 5 O rings to use with the PAX Concentrate Insert. This set is perfect to carry out the perfect maintenance of the PAX 3 device. The Concentrate Insert Replacement can be used as a replacement for the PAX 3 Concentrate Insert. PAX 3 Always Ready The purpose of the Concentrate Insert Replacement Lid is to keep the concentrate in optimal conditions, avoiding