gweike cloud Laser Lens Pack (2.0 inches)Shipping calculated at checkout. Improper use can easily damage the lens and affect your printing process. At this point, if you have a spare, you can keep everything running smoothly for you, and changing 2. 0 inches lenses only takes 2 minutes. These high quality optics for better power density and lower spot. Better quality engraving and better cutting due to smaller dot size when compared to most 2. 0 inches lenses..