3.6mm and 6.3mm Set Orion E-Series Telescope Eyepieces Power pair of two 1.25" telescope eyepieces will help you get up-close looks of astronomical objects without emptying your wallet Short focal length telescope eyepieces of 3.6mm and 6.3mm will amaze you with high-power views of celestial objects Both eyepieces in the set feature fully coated optics for views that are bright and clear Threaded for use with optional Orion eyepiece filters so you can enhance performance easily Boost the power of your starter telescope with this money-saving eyepiece set!