24mm White Open Top Screw PP Cap with Beige PTFE/Silicone Septa - Premium Quality Sealing Solution for Laboratory Use. Our top-of-the-line 24mm white PP cap is expertly bonded with beige PTFE or beige silicone septa for reliable and secure closures. Ideal for a wide range of laboratory applications, ensuring leak-proof and airtight seal for your samples. Upgrade your lab equipment with our high-performance screw caps today!