A must have for the shooter that wants accuracy!
Precision metal apertures in 10 micron steps ( 4.46 to 4.55 mm diameters) to determine head size of .177 caliber pellets. 0.008" 304 stainless gage plate, with acrylic frame. Apertures accurate to +/- 0.0025 mm
Precision metal apertures in 10 micron steps to determine head size of .22 pellets - 0.008" thick 304 stainless gage, acrylic frame. Apertures from 5.05 to 5.14 mm, accurate to +/- 0.0025 mm
Precision metal apertures in 10 micron steps to determine head size of .22 pellets - 0.008" thick 304 stainless gage, acrylic frame. Apertures from 5.48 to 5.57 mm, accurate to +/- 0.0025 mm
Precision metal apertures in 10 micron steps to determine head size of .25 pellets - 0.008" thick 304 stainless gage, acrylic frame. Apertures from 6.33 to 6.42 mm, accurate to +/- 0.0025 mm.
Precision metal apertures in 10 micron steps to determine head size of .30 pellets - 0.008" thick 304 stainless gage, acrylic frame. Apertures from 7.58 to 7.67 mm, accurate to +/- 0.0025 mm
Precision metal apertures in 10 micron steps to determine head size of .35 pellets - 0.008" thick 304 stainless gage, acrylic frame. Apertures from 9.01 to 9.10 mm (0.3547 to 0.3583 in), accurate to +/- 0.0025 mm