Drink Holder Made of 316 stainless steel, 104.8mm O.D.x 7.9mm Ring 50.8mm x 7.9mm ThreadStuds, 63.5mm Above deck when installed54096-01: 1 Ring #50/CTN 54096-02: 2 Rings #50/CTN54096-03: 3 Rings #30/CTN