T.R.U. UPVC-24BS Dark Blue Poly Bag Sealing Tape: 3/8 in. x 180 yds. (Pack of 1) For color coding age of perishables. 3" in. diameter neutral core. Backing/Carrier: Unplasticized polivinyl chloride film Adhesive: Solvent based natural rubber Thickness: 2.4 mils (carrier + adhesive)