1、HIGH DEFINITION AND HIGH TRANSPARENCY LENS: It is made of fully coated optical glass lens, which can provide chromaticity correction and high transmittance to achieve maximum brightness and make the view clear and attractive. 2、MORE COMFORTABLE VIEWING: No fatigue to your eyes during long hours of stargazing. Provides a 35 degree field of view to ensure a clear image with high contrast, making your viewing more comfortable. 3、PRACTICAL FUNCTION: This astronomical telescope eyepiece is very practical, suitable for observing nebulae and other astronomical wonders, bring you a good visual experience 4、COMPATIBILITY: It is suitable for all telescopes with 1.25 inch aperture, such as reflecting telescopes, refracting telescopes and cat's eye telescopes, etc., so you can use it with confidence. 5、BEST GIFT: Astronomical telescope eyepieces can be given to family and friends as gorgeous Halloween, birthday and Christmas gifts to enhance their interest in the field of astronomy. Item Type: Telescope Eyepiece Material: Aluminum Alloy, Optical Glass Interface Size: 31.7mm / 1.25in Thread Size: M28.6x0.6mm 1 x Telescope Eyepiece 1 x Plastic Storage Box