Round PVC Floor Box supplied with reusable concrete cap, conduit reducers, and conduit hub plugs. Available for single service only. Graduated cubic inch markings inside the box indicate volume capacity at any depth. Box has parallel conduit hubs eliminating the need for 90 degree sweeps in installation. One-piece reduction from 1'' to 1/2'' (25mm to 12.7mm) conduit. Reducers and plugs located on a mounting bar for easier selection. For concrete pours of 2 1/4'' to 6'' (57mm to 152mm). Includes one 881ADP Adapter Ring. Box preserves the 2-hour fire rating of the floor in which it has been installed.