Plastic film reticle strips which consist of 5 eyepiece micrometer scales on each strip. 2 strips per pack including a total of 10 micrometer scales. They can be cut out to fit the size of any microscope with an eyepiece which measures 16-24mm. A cost effective alternative to buying microscope eyepieces with pre-fitted micrometers.Micrometer Scale: 10mm length with 100 divisions of 0.1mmOverall size 150mm x 30mm x 0.18mm thickGuide circles of 16mm 19mm 21mm and 24mm around each scale image for cutting.