Seal.
CFR · 2024-01-01 · US · Title 14
Each certificated parachute rigger must have a seal with an identifying mark prescribed by the Administrator, and a seal press. After packing a parachute he shall seal the pack with his seal in accordance with the manufacturer's recommendation for that type of parachute.
official document · source cfr-2024 · id 14:§ 65.133