It is the heart of the optical drive and the most sophisticated part. Mainly responsible for reading data. 2Forged from high-quality materials, with fine workmanship and standardized design. 3. Using high-quality electronic components, it has reliable performance and long service life. 4 Optical laser lenses can resolve symptoms such as slow loading times and disc read errors. 5. It is a good optical laser lens replacement for worn or damaged laser lenses. Note: Before installing the laser head, the protective solder joint needs to be opened before normal use. This kit requires some expertise and ability, please make sure you know how to wire it and use it. Features: It is the heart of the optical drive and the most sophisticated part. Mainly responsible for data reading. Forged from high-quality materials, fine workmanship and standardized design. Made of high-quality electronic components, it has reliable performance and long service life. Optical laser lenses can fix symptoms such as slow loading times and disc read errors. This is a great optical laser lens to replace a worn or damaged laser lens. Specifications: Model: SF-DA23 SF-DA23SRS Dimensions: Approx. 9.5*7.3 cm/3.7*2.9 inches Weight: approx. 64g/2.3oz Package Included: 1 x Laser Pickup Lens Note: Please note that new and old models of this product will be sent randomly, and make sure you don't mind before ordering.