Made up of Polished finish 304-grade stainless steel, specifically designed for marine applications, marine-grade stainless steel adjustable drink holders are Convenient, corrosion-resistant onboard storage for your drinks cups, cans, etc. Equipped with silicone moldings on the retainer arms, and a foam coaster on the inside of the drink holder, to reduce noise and prevent the drink container from sliding, a sleek appearance to suit today's modern watercraft. It has a space-saving folding design, easy installation, and could be mounted on any flat vertical surface, ideal for automobiles, watercraft, RV, and so on. Dimensions: Width: 3.39"" (86.1 mm); Length: 3.26"" (82.8 mm); Height: 0.59"" (15.0mm); I.D.: 2.67"" (67.8 mm). Package Includes Pack of 1 of Marine City 304 Grade Stainless Steel Adjustable Arms Folding Drink Cup Holder.