Laboratory Circle Sealing Sticker Self Adhesive Sealing Labels for 13mm /20 mm Aluminum Plastics Caps, Leak-Proof ,20pcs

nclude 20pcs transparent circle leak-proof sticker for 13/20mm aluminum plastic cover

Designed for laboratory glass vials and aluminum plastic caps to ensure still airtight closure after use the rubber stopper , preventing contamination and leakage

Pre-cut edges and a smooth adhesive layer enable quick,removes cleanly without damaging vial surfaces or leaving sticky residues

Self adhesive backing ensures quick, bubble-free application; peels off cleanly without residue

Perfect for sealing vials, chemical reagents, and biological specimens in research or industrial settings

These rounded open stickers create a secure, effectively prevent leakage after needle punctures, safeguarding contents from air exposure, moisture, and contaminants