Make the switch to OPTI-MAX® for less than ever before with OPTI-MAX® Conversion Kits. Each kit includes all the OPTI-MAX® check valve housings and cartridges you need to convert your HPLC instrument. By default, each kit includes our recommended OPTI-MAX® cartridge, stainless steel/ceramic OPTI-MAX® (PEEK cartridges are supplied for biocompatible systems). However, if you'd like to substitute an alternate material the kit price will not be affected. These kits contain all the check valves you need for your HPLC pump grouped under a single part number and priced at over 20% off list!