Features: 1.The shell was made of quality metal, anti-deformation, anti-rust, sturdy and durable. 2.1.25 inch 3x Barlow lens, fully multi-coated metal with M42x0.75mm thread camera connect interface for telescope eyepieces. 3.High quality barlow lens 3x gives a big magnification boost to 1.25 inch eyepiece. 4.The barlow lens also could offer more magnification without reducing the exit hole on the eyepiece. 5.It is easy to use, place the eyepiece of choice in the barlow lens then insert the barlow lens into the frame. Specifications: Material: Metal + optical glass Color: black Thread: M42*0.75 thread interface Amplification coefficient: 3X Interface: 1.25inch/31.7mm Height: Approx. 65mm/2.6in Packing List: 1*3X Barlow Lens Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List 1The shell was made of quality metal, anti-deformation, anti-rust, sturdy and durable. 21.25 inch 3x Barlow lens, fully multi-coated metal with M42x0.75mm thread camera connect interface for telescope eyepieces. 3High quality barlow lens 3x gives a big magnification boost to 1.25 inch eyepiece. 4The barlow lens also could offer more magnification without reducing the exit hole on the eyepiece. 5It is easy to use, place the eyepiece of choice in the barlow lens then insert the barlow lens into the frame.