Astronomical Telescope T2 Extension Tube Black M48*0.75 Alloy Accessory 5mm 10mm 15mm 30mm

Feature: 1. All metal, anodic oxidation, aluminum manufacturing process, can used for a long time. 2. Using this extension tube, can obtain correct image scale. 3. Inner wall with extinction treatment to avoid radiating light affecting image. 4. Fine workmanship, practical astronomical telescope accessory. 5. Professional manufacturing, stable characteristics and high reliability. Specification: Condition: 100percent Brand New Item Type: M48*0.75 Extension Tube Material: Alloy Color: Black Interface: M48*0.75 Quantity: 1PCS Weight: Approx. 76g Length: Approx. 5mm0.20inch, 10mm0.39inch, 15mm0.59inch, 30mm1.18inch. Package List: 1 x M48*0.75 Extension Tube