Check the listing for details. RAM-233U RAM Rail Adapter Kit for Round Bases.... Color: Black, Condition: New. Listed at 38.94 USD. RAM Rail Adapter Kit for Round Bases... RAM-233U Genuine RAM Products! The RAM-233U rail kit consists of a U shaped rail adapter that connects to a round 2.5 INCHES base. All hardware to connect the rail adapter to the plate is included, along with a rubber strip to allow a tight grip on the rail.hardware included (3) #10-24 x 1.5 INCHES Machine Screws(3) #10-24 Nylock Nuts(1) #8 x 3/4 INCHES Sheet Metal Screw(1) 2 INCHES x 7.5 INCHES Rubber Adhesive Stripclamp range .75 INCHES - 1 INCHES diameterhole pattern 3-Hole 120-Degree: 1.812 INCHES Diametermaterials Marine-grade aluminumpackaging type Poly BagWeight 0.31 lb hardware included (3) #10-24 x 1.5 INCHES Machine Screws(3) #10-24 Nylock Nuts(1) #8 x 3/4 INCHES Sheet Metal Screw(1) 2 INCHES x 7.5 INCHES Rubber Adhesive Strip clamp range .75 INCHES - 1 INCHES diameter hole pattern 3-Hole 120-Degree: 1.812 INCHES Diameter materials Marine-grade aluminum packaging type Poly Bag Weight 0.31 lb