Color: Black, Black-RedFrame Material: PCStyle: Fashion, ClassicLens Technology: Blue Light Blocking, Progressive MultifocalLens Material: ResinMagnification Strength: Strength 1.0x ~ 4.0xType: Progressive Multifocal Reading Glasses-What are progressive multifocal reading glasses?Asymptotic multifocal glasses are the upper optical part of the lens used for far vision and the lower optical part used for near vision. The strength in the middle changes gradually, which is used for intermediate vision. Most people who wear progressive multifocal glasses need about a week to adapt, but the adaptation period varies from person to person; it is slower when they feel dizzy. When going down stairs, lower your glasses and use the upper part. You will feel safe and comfortable.Product Size:Total Width: 137 mm (5.39 inches)Lens Width: 52 mm (2.05 inches)Lens Height: 42 mm (1.65 inches)Bridge Width: 16 mm (0.63 inches)Temple Length: 135 mm (5.31 inches)Weight: 21.6 g (0.76 oz)Package Contents:1 x Reading GlassesNote:1. There is a 2-3% difference according to manual measurement. Please check the size carefully before you buy the item.2. Please note that a slight color difference should be acceptable due to the light and screen.