This OnGlass OG 3.0 Digiscoping Combo Kit includes everything you need to digiscope with the On Glass system. The Base Kit is the essential setup for running the OG system on binoculars and spotting scopes. One kit, one system, everything you need to start capturing what you see through On Glass. IncludedAdapter Ring - Universal outer ring that each spacer size snaps into, housing the magnets for quick auto-alignment with the MagTab.Optic Spacer - 8 sizes available to match your specific eyepiece.MagTab - Low-profile magnetic plate that attaches to your phone case (or MagSafe Backer) with 3M adhesive.Alignment Tool - Centers your phone's camera perfectly to your optic during setup. FeaturesSelf-centering - every time you snap on, you're alignedFits both spotting scopes and binocularsUniversal phone compatibility - no proprietary case required Sizing Guide:Know your eyepiece's outside diameter (in inches)? Match it here to find your spacer size.Alpha 1.55- 1.64"Bravo 1.65- 1.74"Charl...