Made of Polished finish 304-grade stainless steel, specifically designed for marine applications, marine grade stainless steel adjustable drink holders Convenient, corrosion-resistant onboard storage for your drinks cups, cans, etc. Equipped with silicone moldings on the retainer arms, and 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: Length: 4 inches, Height: 13/16 inches, Width: 3-7/8 inches, Arms diameter adjusts from 2-5/8 to 3-1/2 inches. Package Includes Pack of 1 of Marine City 304 Grade Stainless Steel Adjustable Arms Folding Drink Cup Holder (Large).