Triple your power!The Zhumell 1.25in. 3X achromatic Barlow lens triples the magnifying power of any eyepiece used with it!By simply adding a Barlow to your eyepiece collection you can double the range of magnifications achieveable with your existing telescope and eyepieces. The Zhumell Barlow fits any telescope that accepts 1.25in. format eyepieces. And its achromatic optical system provides excellent contrast and accurate color transmission.The Zhumell 1.25-inch 3X achromatic Barlow is a great way to improve your eyepiece collection. It'll double it instantly. And triple its power in the process!Protect your eyepiece investment with a Zhumell eyepiece case.