The Universal Optical Holder 10 mm to 75 mm by Phylabs is designed to securely hold and precisely adjust cylindrical optics with diameters ranging from 20 to 55 mm. Constructed from black anodized aluminum, it offers high durability and excellent corrosion resistance. The holder is compatible with standard M6 x 1.0 posts for easy mounting and features an adjustment screw with a 0.5 mm pitch for fine-tuning the optical component's position. This versatile holder is ideal for optical experiments, laser setups, and other precision applications.