Cup Holder - Level Cup™ - Rail Mount - High-strength composite and powder-coated, marine-grade aluminum mount with drink holder designed with two pivot points to keep your drink upright, regardless of conditions - Kit includes a zinc coated U-bolt base, double socket arm and RAM Level™ Cup Self-Leveling Drink Holder with Koozie; base includes black cover caps to be placed over exposed ends of U-bolt - Integrated eyelet and hook provide an optional tethering function to help secure any small or open container - U-bolt accommodates rails from 0.5" to 1.25" in diameter - Fits cans, cups, mugs, etc. ranging from 2.5" to 3.5" diameter - 1" rubber "B" ball size