On Glass OG 3.0 Spacer Eyepiece Size Alpha through Hotel

The Optic Spacer is the interchangeable core of the On Glass system - each size snaps into the adapter ring to match your specific eyepiece. Grab an extra to run our system on a second optic without buying another full kit. FeaturesSnaps into the On Glass adapter ring - no tools requiredLocks your optic's eyepiece into the exact position for auto-alignment with the MagTab8 sizes available (Alpha through Hotel) to cover the majority of spotting scopes and binoculars