Premium ZWB1 material ensures exceptional optical clarity and performance for various applications. devised with a diameter of 40mm and a thickness of 2mm, this filter is perfect for laboratory and optical setups. Achieves high precision with a thickness tolerance of ±0.05mm and over 90% effective aperture for reliable results. Manufactured using cold working processes to enhance durability and surface accuracy, rated at /4@632.8nm. Ideal for use in scientific research, photography, and optical experiments requiring U-V transmission and visible absorption.