K9 material ensures excellent light transmission and minimal distortion for precise optical applications. Available in various lengths (10mm, 13.5mm, 21mm, 30mm, 33.5mm, 34.5mm) to meet diverse project requirements. Cold working process enhances durability and performance, making it ideal for professional optical setups. Perfect for use in laboratories, educational environments, and research facilities needing reliable optical components. No harmful chemicals involved, ensuring a safe and environmentally friendly choice for all users.