OG 3.0 Adapter Ring OG 2.0 0 comes with one spacer

0 comes with one spacer when you order it

Easily snap on or remove the MagSafe Backer and MagTab for hassle-free wireless charging or device swapping

this eyecup offers superior comfort and stability

our eyecup is built to withstand the rigors of the outdoors

OG 3.0 Adapter Ring OG 2.0 0 comes with one spacerRequired Items for a complete system: 1. OG 3. 0 Adapter Ring 2. OG 3. 0 Magnetic Mounting Plate 3. OG 3. 0 Optic Spacer The Adapter Ring: This is the foundation of the On Glass adapter system. The spacer of your choosing will twist lock inside of this adapter. The Magnetic Mounting Plate will slide into one of the slots at the bottom of the adapter in order to properly center your phone camera on your optic.