20mm Dark Gray Aluminum Flip-Off Vial Seals (Blank Top), Case of 1000

These tamper-evident vial seals feature a 20mm aluminum crimp shell with a flip-off plastic button, designed for secure closure of serum vials in pharmaceutical compounding and laboratory settings. The seals provide reliable vial protection and easy access while ensuring the integrity of the contents. Supplied in a pack of 1000, they are ideal for high-volume use in clinical and research environments.