Item Type: Adapter Ring <br>Material: Aluminum Alloy <br>Product Color: Black <br>Internal Thread Depth: Approx. 6mm / 0.2in <br>External Thread Depth: Approx. 4mm / 0.2in <br>Flange Distance: Approx. 8mm / 0.3in <br>Clear Hole Diameter: Approx. 45mm / 1.8in <br>Product Weight: Approx. 27g / 1.0oz <br>Mount: SCT (M51x1mm), M48x0.75mm<br>1、Adopting aluminum alloy material through precision craftsmanship, it is durable and corrosion resistant. <br>2、The inner wall is treated with extinction processing to prevent the radiation from affecting the imaging. <br>3、It is used to connect the camera to astronomical telescope with stable performance and high reliability, which is a very practical accessory. <br>4、Easy to install and flexible to operate, which can effectively save your time and efforts. <br>5、Light in weight, it will not burden your device when using it, and it can protect your camera.1 x&nbsp;Adapter Ring