Explaining what 2 black disks that come packaged are used for.



The 2 black disks that are included in the packaging for the Prism in the lower left of the image above are for maintaining the adhesive of the suctions when they are not attached to a surface. When the white pieces of paper are removed from the suction cups after using them for the first time then you will need to use the black disks to maintaining the adhesive so that they will continue to firmly attach to a surface for each subsequent use of the Suction Cup mount.

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