Fluorescent screen mounted on pin including magnetic mounting base for automatic PHI axis

• Fluorescent screen of approx. 3 x 3 mm on steel pin with diameter of 2.9 mm
• Magnetic base for mount on automatic PHI axis or easymount 
• Steel pin fits in standard IUCr-type goniometer head (e.g. from Huber)
• Usage: alignment of direct beam on mardtb or other goniostats