Hamamatsu Japan Original Brand New X-ray Source L9181-05, 5μm Spot, Ultra-High Definition Image Quality Product Overview Hamamatsu Japan Original Brand New X-ray Source L9181-05 delivers exceptional imaging performance with ultra-high definition capabilities. Focal Spot Size: 5 μm (at 4 W) - The focal spot of 5 um of the sealed type X-ray tube offers sharp and clear X-ray images even at a high magnification. Connection: No high voltage cable required - High voltage power