High Quality - These lenses are made from high-quality PMMA material, which is durable and has a high light transmittance Easy to Install - The lenses are easy to install and can be replaced without any tools Protective Function - The lenses can effectively protect the laser head and improve the cutting accuracy of the laser Package Content - This package contains 5 pieces of protective lenses, enough for you to replace the old or broken ones Wide Application - The protective lenses are suitable for Creality CR-Laser Falcon laser engraving and cutting machine, and can help you get better cutting effects