150 Features: -Octagon boxes with clamps. -Clamps for nonmetallic sheathed cable, armored cable or flexible metal conduit. -Combination screw heads provide for faster installation. -Time-saving set-up boxes shorten installation time for lighting fixtures. -0.5" Knock outs. -1.5" Deep with nonmetallic sheathed cable clamps. -Non metal clamp ears. -Used in the installation of ceiling or wall lighting fixtures. -Offers a variety of labor saving mounting brackets that allow for easy positioning of box along studs or joists. -Support for fixtures up to 50 lbs. Specifications: -15.5 Cubic inches capacity. -Dimensions: 5" H x 4" W x 1.56" D.