MH-C7 ocular micrometer is used in place of the standard eyepiece of the microscope. There are two crossed rulers inside the eyepiece micrometer. Each ruler is 10mm long and is divided into 100 cells. Each division is 0.1mm.
Material: optical glass, Diameter: 24mm
If you need 19mm diameter eyepiece micrometer, please searce ASIN: B07BF76L7X