Features 1、Easy Installation and Replacement: Designed for TWOTREES TTS 20 PRO, this engraving machine lens is user friendly, making it easy to replace and install. 2、High Transmittance Laser Lens: This engraving machine lens features high transmittance to minimize energy loss and ensure high power during performance. 3、Smoke Resistant Material: Reinforced appearance of the lens prevents smoke damage, allowing for regular alcohol cleaning to maintain excellent performance. 4、Dustproof Design: The carefully crafted engraver lens is dustproof to ensure optimal engraving results and defend the lens for long lasting performance. 5、Ideal Replacement: Wonderful replacement for the old and damaged parts, fine workmanship, attention to details, helps you improve the working efficiency! Specification Item Type: Engraving Machine Module Lens Material: Glass Application: for TWOTREES TTS 20 PRO Package List 2 x Lens