Molded of rugged UV stable black plastic, this cupholder will accommodate cans or bottles, and is only 1.4" deep for installations where space is limited. No drain or holes to keep moisture away from electronics or other items below. Inside dimensions: 2.8" diameter x 1.35" deep. Outside dimensions: 3.55" overall flange diameter x 1.4" deep. Installs with a 3" hole saw.