Backyard Observation Eyepiece 25mm for Distance Stargazing Optical Glass Metal Housing Astronomy Setup, Viewing, Dark and Replacement Needs

25mm Viewing Setup: The clearly marked 25 mm length helps you identify a common eyepiece specification for viewing, stargazing and general distance observation 3.17cm / 1.25inch Fit: This housing is instruments with a 1.25 inch eyepiece interface, giving you a direct fit check for a replacement or spare viewing accessory Factual Detail: The 2-lens structure and 21.5 mm lens diameter add reference for hobby users who want a more informed accessory selection Optical Glass Build: Optical glass lens construction and a metal outer body provide product build for shoppers comparing astronomy accessories for regular observation use Single Piece Package: Each package includes an eyepiece, making it practical to keep a backup for backyard, travel storage or replacement in your observation setup