Size: 90x50 mm Transparent film ruler Material: High Transparent PET Perfect microscope accessory with exquisite workmanship Widely used in microscope applications Durable and stable for routine use Key benefits - Clear measurement reference directly on or beside specimens and images - Durable construction and stable performance for everyday microscope work - Exquisite workmanship enhances reliability and long term use 2-3 practical use scenarios - In a lab or classroom, place the ruler on the microscope stage to gauge the size of tiny features during observation - When capturing micrographs or documenting slides, use the ruler as a scale reference to show feature dimensions - For teaching demonstrations, use the ruler to illustrate scale and size relationships under magnification