13mm yellow cover

High-quality 13mm yellow cover designed for medical glass vials. Features a bright yellow flip-off button for instant visual identification and dosage differentiation. Sterile aluminum skirt ensures a tight crimp seal. Tamper-evident and leak-proof. Compatible with rubber stoppers and standard 13mm vial necks. Ideal for vaccine packaging, injectable medications, and pharmaceutical research. Available in bulk. Order medical flip-off caps today.