The DFA is a drain foaming attachment for use with FOAM-iT foam units. Features: - Stainless steel foam disc to cover drains to cover drains up to 12 inches (30.5 cm) in diameter - Rubber stopper to plug drains 3.5 to 5 inches (8.9-12.7 cm) in diameter - Stainless steel construction - Connects to compatible FOAM-iT units using included quick-connect fittings - Foam travels through drains, providing 360° contact along pipe walls for maxium sanitation What's in the box? - Drain foaming attachment - Quick-connect fittings to make attachment and existing foam wand interchangeable - User manual