Microscope Eyepiece Micrometer Graticule Ruler Ocular-Reticle Diameter19/20/24mm Features: Material: optical glass. High-quality and durable. Reticle-graticule in 0.01mm. There are three sizes on offer: 19mm 20mm and 24mm. Please choose the right size for your microscope. Please choose the right size for your microscope. Specifications: Material:Glass Diameter:19mm/0.75'',20mm/0.79'',24mm/0.94'' Package Includes: 1x Oculars Micrometer note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.
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