The Aluminum Flip-Off Seals, 13mm in diameter with a red blank top, are critical closure components for securing medical vials in pharmaceutical and compounding settings. Featuring a durable aluminum shell that crimps tightly onto vial stoppers, they ensure a hermetic, airtight seal to maintain sterility and protect contents from contamination. The integrated polypropylene plastic cap allows easy, tamper-evident access, supporting safe and efficient handling of injectable or parenteral medications. Supplied in a 1000-count package, these seals are essential for high-volume sterile compounding applications.