HVAC Grill Mask- Vent mask- Duct Mask.  Our lightweight low-tack film sticks to registers and removes easily afterwards.  The bright blue color stands out to customers and technicians.  It's great for air duct cleaning, pressure testing, and duct sealing.  And it can also be used as temporary floor covering.  Giant 300' roll.  Perforated every 4" for easy sizing!  Consistent milling and adhesive provides a superior quality product.  Made in the USA.