Opera Glasses One Eye Binocular Kelvin & Hughes London Monocular Product Type- Spy Glass Monocular, Total Length - 4" (inch) by 2.5" ( inch ) when fully extended Opera Glasses One Eye Binocular From Kelvin & Hughes London This is a reproduction of Antique brass opera glasses measuring 4" X 2.5 " . The focus and magnification can be adjusted by the Sliding .This is a quality product and the craftsmanship is flawless. Ideal for using to watch theater , Gifting Magnification- 10X, Color - vintage Pink , Ideal for using on boats, hiking trips, bird watching and gifting. Handling Time- 1 Day ,