Material: Brass & Mother Of Pearl & Black Finish: Nickel & Chrome.                 Magnification: 3X.                                       The product is a set of Nickel Chrome  vintage opera glasses binoculars with a white mother of pearl and brass handle. These handmade binoculars have a Porro prism optical design, a 3x maximum magnification, and a zoom lens feature. Measuring approximately 3.75 x 4 inches, with a lens diameter of less than 20 mm, these binoculars are perfect for opera glasses application. Made in India, this unique and stylish piece of eyewear is a must-have for any opera enthusiast or collector of vintage optical instruments.