Monel is a lightweight, durable and corrosion resistant metal comprised mainly of nickel and copper. Nickel Silver is another commonly used metal comprised of copper, nickel and zinc. Both metals hold their shape well and can be plated or spray coated in a large variety of colors.Discover the perfect blend of style and functionality with Marchon NYC TRES JOLIE 160 Eyeglasses. These high-quality eyeglasses feature a sleek design and durable construction, providing both fashion and practicality. With Marchon NYC, you can trust in their expertise and expertise for the perfect eyewear solution. Metal PVC Nosepads Flex/Spring Hinge Cornered Rectangle Grooved Rimless Size*50 Size*52 Bridge / Distance Between Lenses: 17.0 17.0 Horizontal Lens Measurement, A: 50 52 Vertical Lens Measurement, B: 31.3 32.6 Effective Lens Diameter, ED: 52.7 54.8 Temple Length: 135 135 *All of these measurements are in millimeters