Thorlabs or Newport Ø 25mm mount + Ø 25mm PCX lens Description: a small mirror mount with a PCX lens. It holds 25mm lens (down to 12.6mm if you glue them). Lens has a diameter of 25mm, it is 80mm focal length and antireflection coated in the visual spectrum. The mirror mount also has the base mount for the breadboard or similar. It has a little tube that has a 0.5" (12.6mm) clear diameter (external Ø= 18.7mm). You can remove tube and lens stays in place (once removed, clear diameter is same as lens: 25mm, see 4th pic). Lens is glued to the mount in three small portruding places at the mount (easy to remove without hassle, just remove little tube and push). Other measures: Base dimensions: 37x35mm. Depth: 37mm. Width (lens looking at you): 35mm. Total height: 50mm. Condition: used but in perfect smooth working order. Mount is in like new condition. Lens has a couple of little nicks (see 5th and 6th pics).