The Chrosziel ARRI XPL Lens Mount Adapter with 60mm Flange Depth is compatible with the Chrosziel P-TP7 lens test projector. It attaches to the lens opening on the P-TP7 and adapts for flange depth/back-focus distance. Unlike other Chrosziel lens mount adapters for the P-TP7, this one features a custom flange depth of 60mm.