【Versatile T2 Thread Adapter】: Features a standard M42x0.75mm male thread on both sides, great compatible with securely connecting or extending two components with female T2 threads, such as cameras, eyepieces, or other astrophotography accessories 【Metal Construction】: Precision machined from metal material. This ensures a sturdy, and minimizes internal reflection compatible with improved image contrast 【Maximized Light Throughput】: Designed with a large 38mm clear aperture to prevent vignetting, ensuring the maximum amount of light reaches your camera sensor or eyepiece compatible with brighter, clearer views across the entire field 【Low Profile Design】: Adds only 2mm of optical length (flange distance), making it an ideal solution compatible with setups where back focus is critical. The total length is 8mm, with a secure thread depth of 3mm on each side 【What You Get】: Each package contains a Double Sided M42 Male to M42 Male Thread Adapter Ring, ready to integrate into your telescope setup right out of the box Specification: Material: Metal Size Chart: 5.6cmx5.6cmx8mm/2.20inchx2.20inchx0.31inch Thread Depth 3mm Flange Distance 2mm Total Length 8mm Light Aperture Diameter 3.8cm/1.50inch Package Includes: 1 Telescope Adapter Ring Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!