This ZEISS Interchangeable Mount Set PL allows users to convert their CP.2 135/T2.1 lens to PL mount. The set includes a PL mount ring, Torx screws, eleven color coded shims and a rear lens cap. As the flange focal distance varies from camera type to camera type, it is sometimes necessary to make adjustments when changing the lens mount or camera model, and in order to perform this adjustment, ZEISS provides shims in eleven different thicknesses.