This adapter has a standard SCT male thread "2inch; 24 TPI" on one side to connect to the female SCT thread
The other side has a standard 42mm "M42 x 0.75" female thread
All metal construction and anodizing aluminium process; durable for long time use
Precision Thread Conversion: This telescope adapter is designed with external threads at both ends of M42×0.75 T/T2 male thread and internal thread of M42×0.75 T/T2 female thread
Anodized Aluminum Material: All metal construction, which significantly extends service life of product; Lightweight aluminum construction effectively minimizes load on telescope accessories, making it well-suited for long time astronomical observation