40X optical element for precision smallscale observation. Compact 1.25 inch (31.7mm) barrel diameter with RMS 20.2mm interface and M28*0.6mm internal thread. Focal length 4mm. Built from quality materials for durable, stable performance and long service life. Key benefits Precise magnification: 40X specification and 4mm focal length deliver resolution closeup viewing for detailed inspection tasks. Broad compatibility: Designed to fit a 1.25 inch (31.7mm) barrel and standard RMS 20.2mm mount. Internal M28*0.6mm thread allows attachment of compatible adapters, filters, or accessories. Robust construction: Manufactured from quality materials to resist wear, maintain optical alignment, and provide consistent performance over time. Stable results: Fixed focal length minimizes adjustment drift and supports repeatable imaging or observation setups. Easy integration: Compact size and common thread standards simplify installation into existing optical rigs, microscopes, or adapter assemblies. Technical specifications Magnification: 40X Barrel size: 1.25 inch (31.7mm) RMS thread: 20.2mm Internal thread: M28*0.6mm Focal length: 4mm Materials: quality, durable construction for longterm use Practical applications Laboratory and education: Use for classroom demonstrations and lab exercises that require clear, repeatable magnified views of small specimens or sample surfaces. Inspection and quality control: Ideal for electronics inspection, PCB component checks, and precision part evaluation where compact, stable magnification is required. Hobby and research: Suitable for microscopy hobbyists, collectors, and smallscale research projects that need a reliable 40X optical element and simple adapter compatibility. Why choose this component Fits established thread standards to reduce the need for custom adapters. Durable build and stable focal design help maintain image quality during repeated use. Compact form factor makes it convenient for portable setups and tight optical assemblies. Compatibility notes Confirm that your instrument accepts a 1.25 inch (31.7mm) barrel or an RMS 20.2mm interface. Use the M28*0.6mm internal thread to attach compatible accessories or adapters where required. This optical element provides a straightforward, durable option for applications that require 40X magnification, compact sizing, and standard thread compatibility.