A quality eyepiece - providing a better image than those that come included with new telescopes.
52 degree field of view (46° for the 40mm) - significantly wider than Kellner and standard Ploessl eyepieces.
Multi-coating and blackened lens edges for high contrast: When observing with a telescope, it really all comes down to good quality eyepieces - these are just as important as the telescope itself.
1.25" connector - the eyepieces will fit in any telescope. Rubber fold-down eyecups to protect against stray light.
A large range of focal lengths - from 4mm to 40mm: These eyepieces provide you with a range of 9 focal lengths. So you are guaranteed to find the right magnification and increments for your telescope. And the best part - all the eyepieces are parfocal.