Cospak’s 130 mm natural polypropylene screw lids are designed to pair seamlessly with round-neck jars and containers, providing a secure and leak-resistant seal. Manufactured from durable, autoclavable polypropylene, these lids offer excellent chemical and heat resistance, making them ideal for laboratory, medical, and industrial settings. Their natural finish allows easy identification of contents when used with clear jars, ensuring reliability in both storage and handling.