Item Type: Astronomical Refracting Telescope Material: Metal, Plastic Product Size: Main Mirror Tube: Approx. 33.2x13.5x7.3cm/13.1x5.3x2.9in Tripod Expansion Size: Approx. 21x19x34.1cm/8.3x7.5x13.4in Aperture: Approx. 40mm/1.6in Focal Length: Approx. 400mm/16in Applicable Age: 7 Years Old and Above 1[Large aperture] Refractive telescopes are equipped with 40mm large aperture lenses for brighter and clearer imaging. 2[Clear] The larger the aperture of the telescope, the larger the field of view. Professional telescopes can help adults and children view the planets and the moon. 3[Easy To Assemble And Use] Even for beginners and children, our astronomical refractor telescopes are easy to assemble, and easy to focus and use. 4[Age Appropriate For Children] Astronomical Telescope is perfect for children ages 7 to 12. It allows kids to quickly find the target and see a clear image. 5[Great gift] Refractor Telescope is the perfect gift for kids and beginner astronomers at Christmas, birthdays, children's day and graduation. 6[Function] Telescopes help us build an interest in astronomy and science, enjoy nature, draw the world closer and explore the unknown.All data are measured manually, and there are certain errors in the measurement results. 1 x Main Lens Barrel 1 x Tripod 1 x Corner Lens 1 x English Manual 2 x Eyepiece 2 x Eyepiece Storage Case