Description Only when the optics have been accurately collimated can the telescope offer you its full performance. This sturdy unit allows you to swiftly and precisely collimate your Newtonian telescope. Designed for reflector telescope, fit for standard 1.25 inch diameter. Features - Color: Black. - Size: 13.50X5.00X5.00cm/5.31X1.97X1.97 inch. - Material: Zinc alloy. - Powered by: CR-2030. - Power: 1mw 5mw. - Brightness adjustment: 7 levels. - This telescope collimator supports 7 levels of brightness adjustment. - Power saving design, low consumption and durable for long time use. - Come with eyepiece adapter, can transfer 1.25 inch to 2 inch thread. - Can help accurate collimation of telescope in a quick and easy way. - Adopts precision production to enhances the stable characteristics and high reliability.Package list: 1 x collimator 1 x eyepiece adapter