Feature:
New concentration rack with ball bearing
Coaxial coarse and positive focusing
Diameter of annular ring preserving microscope head: 76mm
Diameter of opening for stand publish (arbor): 25 mm/32 mm
Working stroke: 50mm
Center distance: 156mm
One scale of good focusing: 0 mm
Rotate one circle to upward thrust or fall: 0
Suit For Microscope: zoom high strength electronic microscope
Packing including:1 x Microscope Adjusting Bracket