Edmund Optics Inc. 21mm Diameter Contact Reticle, mm Square NT32-257

These glass reticles offer greater stability than film reticles which can bend, warp, and easily be damaged. Patterns are low reflection chrome deposition for high contrast and easy readability. Markings are on the outside of the reticle, so the scales are always in direct contact with the object under view. This provides optimum focus and accurate measurements. Our 21mm and 27mm diameter reticles for use with our 6X and 9X comparators and our 26mm and 35mm diameter reticles for use with our Peak Measuring Loupes and our Peak Illuminated Magnifiers. Please note the field of view specified for the magnifiers before selecting a magnifier/reticle combination. For example, the 5/8" (16mm) field of view for a 12X comparator may not be suitable for use with a reticle that has a 3/4" (20mm) scale if the full scale is needed. Thickness/ Hole Gauge Reticles A series of parallel lines 0.001" to 0.008" apart measure thickness. 10mm metric scale is divided into units of 0.2mm.0.5" decimals-inch scale divided into units of 0.005".Hole Diameter scales read in fractions of 1/64" to 1/16" and decimal scale from 0.005" to 0.05". Square Grid Reticles English Scale: 0.5" square divided into 0.05" squares.0.5" square in 100 parts.13 circles in sizes from 0.01" through 0.1".Metric Scale: 10mm square divided into 0.5mm squares.10mm scale in 100 parts.13 circles in sizes from 0.1mm through 2.5mm. Multi Gauge Reticles 0.3" x 0.4"grid in 0.025" squares.Two Horizontal Scales; 0.4" with 0.005" divisions, and 20mm with 0.1mm divisions. Angle scale 0 degree to 90 degree in 1 degree increments. Radius scale 1-10mm.Nine circles from 0.1mm to 3mm diameter. Multi Scale Reticles Scales: 20mm in 0.5mm 10mm in 0.1mm 1mm in 0.05mm 0.5" in 0.005" 1/8" in 1/64" 90 degree scale in 0.5 degree, 80-90 degree in 0.1 degreeRadius Arc: 10mm in 0.5mm 1mm in 0.1mm 29, 55, 60, 118 degree angle scales Left Circles; 0.1mm to 1mm in 0.1mm Right Circles:0.005 to 1/64".