The locking 3.25"
Suction Cup Base has a diamond shaped end that will fit
either the Diamond Shaped 1" Ball Base or Diamond Base
with 6" flex arm
The suction cup is designed to have an extra strong
hold on any smooth non-porous surface, but for best result,
mount the suction cup on a glass surface. The suction
cup has two holes on top that are 1.912" from center
to center.
