Welcome to our store! Seamless Connection: This telescope adapter ring offers seamless connectivity, allowing M42 and M48 fittings to be joined together. 0.75mm Thread: This M42 to M48 coupling ring adapter features an M42x0.75mm male thread and an M48x0.75mm female thread. Aluminum Alloy: Constructed from robust and durable aluminum alloy material, this M42 to M48 ring adapter ensures long-lasting use. Easy Installation: The telescope adapter ring is simple to install, providing flexibility and convenience during use. Light Suppression Treatment: The inner wall of this telescopic lens filter ring adapter is treated to prevent light radiation from affecting the image. Item Type: Telescope Adapter Ring Material: Aluminum Alloy Female Thread Specification: M48 x 0.75mm Male Thread Specifications: M42 x 0.75mm (commonly known as T2 thread) Thread Depth: 3mm Flange Distance: 4mm Total Length: 7mm Inner Hole Diameter: 39mm Outer Frame Diameter: 50.7mm±0.1mm Package List: 1 x Telescope Adapter Ring 1 x Plastic Storage Box 100% Satisfaction: Our customers are our top priority. If you discover any product issues after receiving the item, such as damage or incorrect quantity, please contact the seller immediately. We will do our best to provide you with satisfactory after-sales service.