DIN28 Screw Cap – Black, Child-Resistant & Aluminum Induction Sealable Secure your packaging with this robust HDPE screw cap in DIN28 size (28mm). The child-resistant design provides extra protection, while the aluminum induction seal ensures an airtight seal. Perfect for tubes containing liquids that require long-lasting freshness and safety. The black color makes your product instantly recognizable on the shelf. Ideal for professional packaging solutions.