This kit includes all replacement panels required to reline the Beseler #6744 35mm Mixing Chamber as supplied with the Dichro 35S, and optional for Dichro 67, Dichro 67S, and 67 variable contrast heads, and the optional #8014 35mm Mixing Chamber for 23CII-XL Dichro Colorhead and 23CIII-XL VC and Dichroic lamphouses. If the housing, diffuser panel, and heat filter are still in good condition, this is an easy and inexpensive way to bring your mixing chamber back to like new performance.