Aluminium Alloy 1.25inch Telescope Collimation ​Eyepiece Accessory for Newtonian Telescopes Features:<br style="white-space:normal;" /> Made of material, which is anti-rust, wear-resistant and durable. The inner structure has light eliminating thread, can reduce light reflection to improve clearness of view. Collimation eyepiece is more accurate than the normal collimation tool, can help you better enjoy star. With a red crosshair for easy adjustment of collimation. Easy e and convenient to carry and store. <br style="white-space:normal;" /> Specifications:<br style="white-space:normal;" /> Material: Aluminum Alloy<br style="white-space:normal;" /> Color: Black<br style="white-space:normal;" /> Thread: 1.25inch / 31.75mm<br style="white-space:normal;" /> Suitable for Newtonian Telescopes <br style="white-space:normal;" /> Size: Approx. 14.5 x 3.5cm / 5.7 x 1.4inch Weight: Approx. 197g<br style="white-space:normal;" /> <br style="white-space:normal;" /> Package Included:<br style="white-space:normal;" /> 1 x Telescope Collimation Eyepiece Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store