7120 Features: -Round ceiling cable box for ceiling fans. -Made of heavy-duty engineered compound. -Optional front-mounted grounding screw. -4" Round ceiling for ceiling fans. -4" Clamps, two 0.5" knockouts. -Self-gripping wire entry clamps. -Grips the joist for hands free positioning and installation. -Designed to accommodate 0.5" thick drywall. -Mounting hardware and instructions included. -UL listed. Specifications: -Rated for 70 lbs ceiling fan and 210 lbs fixture support. -12.5 Cubic inches capacity. -Dimensions: 3.89" H x 4" W x 2.6" D.