9.Solutions - Suction Cup with 3/8+1/4" Cheeseblock
9S900801The Suction Cup comes equipped with a unique "cheese block" which is tapped with multiple 1/4?-20 and 3/8?-16 female threads on all seven sides.
It also features two 3/8? rod clamps which can be positioned on any side of the cheese block opening up a wide range of rigging configurations.
Click here for details, specs & description on manufacturers site.