Package of 2, Triangle Plastic Ceiling Corner Air Diverter is made to be inserted between the ceiling grid system and a 2'x2' air diffuser. Made of durable 0.090 gauge polystyrene so it is built to last. It is white in color so it will blend seamlessly with most ceilings and HVAC air diffusers. At 1800ceiling.com, we offer a full array of air vent deflectors suitable for a wide array of installations and applications. Shop our expansive inventory of air vent deflectors and air vent diverters below and save on all of your ceiling repair needs. Package of 2 NOTe: We do not advise placing two over the vent. Do not block total airflow from vent. The air diverters may blow off the ceiling if entire vent is covered.