SPECS: 1095 high-carbon, spring steel, blued. .01" (.25mm)
thick. Post & Aperture Card includes 3 apertures, 4
crosshairs, 3 posts. Lyman 17A also fits Browning BPCR. .470"
(12mm) dia., Redfield/Alley - .550" (14mm) dia. Fits Redfield 65/66
and Alley globe sights. Large Lyman/Anschutz - .675" (17.1mm)
dia., Parker-Hale - .587" (14.9mm) dia., Redfield Olympic - .700"
(17.8mm) dia., Redfield International/Mid Tompkins - .769"
(19.5mm) dia. All Aperture Card features 10 apertures,
from .072" (1.8mm) dia. to .145" (3.7mm) dia. Models for Redfield
International/Mid Tompkins and Redfield Olympic.