Heater matrix/core to suit earlier style heaters fitted to 105 series cars up to 1968. Approx 6 cm/2.5 inches thick on the sides with a 32mm thick core. Note that the changeover year is only approximate as the heater design changed at different times for different models. Check yours carefully before ordering! The early heaters are identified by having a large flap on the front which you have to open manually.