Features: Brand new and high quality Advanced achromatic lens, super sharpnesses and color corrections, opticals component, real physical computings magnification. 3x power any 1.25" telescope eyepiece with the universally barlow lens for owner of fast short nuclear length telescopes. It increases the magnification, the picture will be clear than the average increase in magnification up to 15 time the picture clarities 3x Barlow the magnification of any 1.25” eyepiece. Compatibles with most 1.25inch diameter telescope eyepieces Includes both end hat to protect against dust. This Barlow come with a set screw to secure holds your eyepieces works on most brand of telescope. Specifications: Component: Plastic Color: Black Size:Approx. Length: 80mm/3.15in Bottom Diameter: 31.70mm/1.25in Magnification:3x Lens component: opticals lens Lens paintcoat:FMC multilayered paintcoat Interfaces size:1.25inch Quantity: 1Pc Package Includes: 1Pc Barlow Lens note: Please allow 1-3cm error due to manual measurement. please make sure you not mind befores you bid. Due to difference between different monitors, the picture may not reflect the actual color the item.