Super Blue boxes resist flexing and maintain rigid shape. Recessed flip-out toggle clamp allows clamp to be positioned below the box edge, allowing a square cut-out in the wall, and eliminating the need to use a template. Intergrally molded cable clamps eliminate the need for press-in clips and metal clamps and are designed to nest or stack into each other, allowing for smaller packaging and less shelf space to stock. 4" x 2.5" x 3.5". 18 cu. in volume. UL listed.