On Glass Adapter Spacer OG 2.0/3.0

The Optic Spacer: is NOT a completely universal part. The Optic Spacer is dependent on which optic you choose to use your adapter on. Each spacer has a range of sizes it can be used with, so you can use your spacer on more than one single optic! Select one of the available optionsNOTE: The OG 2.0/3.0 comes with one spacer when you order it. This is an additional optic spacer that works with both the 3.0 and 2.0 versionsTO DETERMINE WHICH SPACER YOU NEED IF YOUR OPTIC IS NOT LISTED. MEASURE THE OUTER DIAMETER OF YOUR OPTICS EYE PIECE. (listed in decimal inches)Alpha 1.55-1.64Bravo 1.65-1.74Charlie 1.75-1.84Delta 1.85-1.94Echo 1.95-2.04Foxtrot 2.05-2.14Gulf 2.15-2.24Hotel 2.25-2.34