Twin micro focus X-ray sources that can be use either CuKa or MoKa radiation. Lower power (40W) air-cooled, but the X-ray beam is focussed into a smaller, high brilliance beam. Four circle kappa goniometer and rapid read out CCD detector. This system is used for smaller crystals and those structures that need accurately measured anomalous diffraction signals, for the unambiguous determination of stereochemistry for example. This diffractometer is used for more demanding chemical structures.