Seal the Deal with Confidence! 🔒 Ideal for various applications in laboratories and pharmaceutical settings. LabZhang brand ensures high standards and reliability in every cap. 20mm diameter ensures a snug fit for standard glass vials. 100 caps per pack means you're always prepared for your pharmaceutical needs. Unique full tear design guarantees tamper evidence and safety. 100 Pcs Pack Full Tear Design 20mm Diameter The 100 Pcs 20mm Flip Off Caps are designed for secure sealing of glass vials, featuring a unique full tear design for tamper evidence. Made from durable aluminum-plastic, these caps come in a convenient bulk pack, ensuring you have the right supplies for your pharmaceutical needs. Trust LabZhang for quality and reliability.