The Set of 2 Meade Series 4000 DS Super Plossl Telescope Eyepieces includes a 9.7mm and 26mm focal length, making it versatile for different viewing experiences. These eyepieces are fully multicoated for clear and sharp images and have a 1.25 inch diameter that is compatible with Meade Series 4000 DS Super Plossl telescopes. Made by Meade, a trusted brand in telescope accessories, these eyepieces are designed for high-quality viewing experiences in the night sky.