These high quality drink holders are CNC machined from solid chunk of 6061T6 aluminum. They are available in a variety of sizes and finishes. These are unique in that they have a 3/4″ step in the bottom to accomodate both small and large drinks. Fits in 3 3/4″ hole and is 3 1/2 ″ deep (this includes the step). Outside of flange measures 4 1/2″.