Bertech 1/8" Wide x 72 Yards Long Blue Masking Tape, 1 Mil Thick on a 3" Core Blue Masking Tapes are made of 1 mil thick polyester film and 2 mil thick silicone adhesive They can be removed cleanly without leaving an adhesive residue They can withstand temperatures of up to 400F/(204C) They are packaged on a 3" core Rolls are 72 yards long