All metal construction with aluminum processing for long-term use. High-quality anodized aluminum adapter with M48 female thread to M54 male thread. Converts M48x0.75mm male thread to M54x0.75mm male thread, or M54x0.75mm female thread to M48x0.75mm female thread. Enables conversion from female M54x0.75mm thread to female M48x0.75mm thread with minimal mechanical length. External thread: M54x0.75mm. Internal thread: M48x0.75mm. Overall length: 5.5mm. Material: Metal. Color: Black. Package includes: 1 x telescope accessory. Product package includes only the items listed. Other accessories not included. Note: Lighting and display differences may cause slight color variations between the image and actual item. Measurement may vary by +/- 1-3cm.