SPECIFICATIONS: (4) - 3/16” pre-drilled mounting holes Outside Dims (Flipped Up) - 4 1/8” x 4 1/8” Inner Base Dims (cup holder surface) - 3 3/4” x 3 3/4” KEY FEATURES: Adjustable Arms (3 positions for small, medium and large cups) 1st position - 2 1/2” diameter (pop can or bottle) 2nd position - 3 1/4” diameter (standard thermos/tumbler) 3rd position - 4” diameter (oversized cup) Close/Flip up when not in use for a clean inish Made of UV Stabilized Polycarbonate, extremely durable Wide variety of colors (min purchase may be required)