This is the In-Line Multimode Fiber Optic Filter Mount, designed for use in the 250 nm to 450 nm wavelength range. It is manufactured by Thorlabs, a leading brand in the field of optics and photonics. The catalog number for this product is FOFMF/M-UV, and it is available in the metric measurement system.
The mount is rectangular in shape and can accommodate an optical element with a maximum size of 25.4 mm. It has a thickness of 8 mm and features an M6 tap for post mounting screws. The weblink for this product is https://www.thorlabs.com/thorproduct.cfm?partnumber=FOFMF/M-UV, and the product is currently in stock.
The FOFMF/M-UV is a part of the Mount Accessories category, more specifically, it falls under the subcategory of Optical Filter Mount. It is designed to be used with optical fibers that have FC/PC connectors. The item data provided does not include any laser data.