4" x 60 yds. Intertape - 534 Flatback Tape. Ideal for splicing webs or package sealing. Meets U.S. Postal and UPS shipping requirements. Stronger than masking tape. Easy application - just tear and apply by hand. No water or dispensers needed. Write directly on tape. 7% elongation at break. Solvent NR/SIS adhesive. Case of 12.SHPT949534. T949534. Intertape Intertape 534 Flatback Tape.