Carlon B120AR-UPC Single Gang Box With Nails Carlon B120AR-UPC Single Gang Box With Nails Features: •Designed for use with nonmetallic sheathed cable in accordance with Article 370 of the 1990 National Electrical Code •For Residential, Lig ht Commercial, and Manufactured Housing, PVC •Single gang with captive nails •4 knockouts, 2 each end •20.3 cubic inch box •3-1/4" deep x 2-1/4" wide x 3-7/8" lengt