Feature:1. Appliction: It is suitable for astronomical telescopes with a focusing barrel thread of M35x0.75mm. With this adapter, accessories with a 1.25 inch interface can be used.2. Fixing Screw: There are fixing screws on the side for fixing the 1.25 inch telescope attachment to the focusing tube. More stable and secure.3. Stable Performance: During the focusing process, the inserted eyepiece or zenith does not rotate, but only moves linearly, which is conducive to observation and shooting.4. High Accuracy: Micro focusing is extremely precise, it can keep a stable and fluent operating even at huge magnifications.5. High Quality Material: Aluminum alloy material, longer service life and more durable. Easy to install and operate, easy to use and more practical.Specification:Item Type: Focus Mount AdapterMaterial: Aluminum AlloyGross Weight: Approx. 17g / 0.60ozThread Specification: M35x0.75mmThread Depth: 7mm / 0.28inInterface Size: Approx. 1.25 inches (about 31.7mm).Package List:1 x Adapter