Check the listing for details. RAM Mount Locking Suction Mount Base Without Ball RAP-224-1U. Color: Black, Condition: New. Listed at 14.99 USD. Manufacturer Description The RAP-224-1 RAM Mount Locking 3.25 inch Rubber Suction Cup Base has a standard RAM double hole diamond shaped end. 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 or non-porous plastic surface, as found on our Non Skid Base with Plastic Plate, Plastic Adhesive Disk and Cup Holder with Plastic Plate. The diamond shaped end has two holes 1.912" from center to center design to connect to one of the following:a RAM-B-238 Diamond Plate plate with 1 inch rubber ball,to the universal industry standard AMPS hole pattern ordirectly to the back of the RAM Plastic HOL Cradles. Note: This suction base DOES NOT have a RAM 1 inch rubber connection ball.Manufacturer Description The RAP-224-1 RAM Mount Locking 3.25 inch Rubber Suction Cup Base has a standard RAM double hole diamond shaped end. 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 or non-porous plastic surface, as found on our Non Skid Base with Plastic Plate, Plastic Adhesive Disk and Cup Holder with Plastic Plate. The diamond shaped end has two holes 1.912" from center to center design to connect to one of the following:a RAM-B-238 Diamond Plate plate with 1 inch rubber ball,to the universal industry standard AMPS hole pattern ordirectly to the back of the RAM Plastic HOL Cradles. Note: This suction base DOES NOT have a RAM 1 inch rubber connection ball.