Description: Material: This 3X Barlow lens is made of a sturdy metal structure, ensuring durability and longevity. The lens itself is crafted from optical glass with chromatic aberration correction, providing clear and sharp images.Compatibility: With a 1.25 inch (31.7mm) interface, this Barlow lens is suitable for all types of telescopes with a 1.25 inch interface, making it an ideal accessory for astronomy enthusiasts.Enhanced Magnification: This Telescope Barlow Lens features a 3X magnification power that can effectively triple the capacity of your telescope, allowing you to celestial bodies in greater detail.Advanced Coating: The 1.25 inch Barlow Lens comes with multi layer broadband anti reflective green coating which enhances light transmission for brighter and clearer views.Protective Design: The interface of Barlow lens includes an inbuilt copper ring to protect the eyepiece from damage, ensuring long term use without compromising performance or quality. Product dimension is 7.5cmx3.17cm/2.95inchx1.25inch making it compact and easy to handle or store when not in use. Specification: Material: Metal Size Chart: 7.5cmx3.17cm/2.95inchx1.25inch Package Includes: 1 SetTelescope Barlow Lens Note: Please allow slightly errors 1-2cm differences due to manual measurement.