It are high-quality closures designed for secure sealing of containers, ensuring leak-proof storage and transport of liquids. Manufactured from durable black High-Density Polyethylene (HDPE), these locks feature a PE foam ring seal that provides an additional layer of protection against leaks and contamination. With a 45 mm thread size, they are compatible with various canisters and jerricans. Supplied in a pack of 10, these locks are ideal for laboratory, industrial, and commercial applications requiring reliable sealing solutions.