TEC - 6 rolls of Premium DuctMask™ Temporary Register Sealing Tape (8 inch) DUCTMSK-CSStays stuck when you need it to and cleans off easily when you are done without paint damage The best tape to seal registers we have ever used for duct leakage testing. Sold by the case only. One case includes 6 rolls of 8 wide x 200 long tape. Each roll is perforated every 4 inches for easy adaptation to any size register. Item: DUCTMSK CS