Wide metal fan style base with reversible black and white stage plate (95mm diameter); Coaxial fine and coarse focusing with anti-slip tension adjustment; The distance from track to the plate centerline is 128mm; This stand can be extended up to 250mm (bottom microscope to stage); Focusing distance is 175mm; Base dimensions are 335mm x 305mm x 21mm; Stage clips included; Stand with microscope is 17 pounds.