Features 1、Scratch Resistant Design: The Telescope adapter is 2 inches (50.8 mm) inside, with a scratch resistant design, which fully protects the 2inch attachment appearance from being scratched by screws. 2、Simple Operation: directly insert the 1.25inch astronomical telescope interface, so that the 1.25inch interface is converted into a 2inch astronomical telescope interface, which is convenient to connect accessories such as eyepieces with a 2inch interface. 3、Scope of Application: Allows you to use the 2inch telescope attachment on any 1.25inch (31.7 mm) interface telescope primary mirror or guide mirror. 4、Set Screws: The adapter comes with set screws on the side, and with a single turn of the screw, your 2" accessory will be securely held in place. 5、Aluminum Alloy Material: The Telescope T mount adapter is made of aluminum alloy material, which has a longer service life and is more durable. Easy to install and operate, easy to use and more practical. Specification Item Type: 1.25 to 2 Telescope Adapter Material: Aluminum Alloy Back End Interface Specifications: 2in (about 50.8mm) for 2in Telescope Accessories, Etc. Front Connector Specifications: 1.25in (about 31.7mm), Suitable for Equipment Such As the Main Mirror or Guide Mirror of the 1.25in Astronomical Telescope. Thread Specification: Approx. M28.6x0.6mm / 1.1 x 0.02in Antislip Reinforcement Design: Yes Anti Scratch Design: Yes Extinction Design: Yes Package List 1 x 1.25 to 2 Telescope Adapter