Specification Brand : Quarton BulletPoint1 : Fan Angle 20° Uniform Line. Line length: 35cm at 100cm (14" at 40 inches). High precision red line laser module in compact size. Built with high precision glass line lens and glass laser collimating lens for machine vision and laser alignment application. BulletPoint2 : Focus range: 90cm. Recommended working range: 31~142cm (12.2~55.91 inches). Best performance working range: 59~122cm (23.23~48.03 inches). BulletPoint3 : Wavelength : 630~645 nm. Laser power output: Class I, less than 0.39mW (measured by 7mm aperture stop at the position of 10 cm, tested according to the standard IEC-60825-1.) BulletPoint4 : Dimensions : Ø10 x 40 mm (Ø0.39" x 1.575"). Weight: 22g (0.776 oz.) BulletPoint5 : 3~6 VDC operation. Connection type : Lead wire. This laser module is not supposed to be sold with additional power source, power supply, or wiring terminals. Because modules are simply components, and it means that you have to wire it to your own power source by yourself. ExternallyAssignedProductIdentifier1 : 705702456871 ExternallyAssignedProductIdentifier2 : 0705702456871 ItemName : Quarton Laser Module VLM-635-56 LPO-D20-F90 Red Line Laser Module Fan Angle 20° Uniform Line, Class I Laser, Less Than 0.39mW (Focus: 90cm) ItemPackageDimensions_Height : 12.8 centimeters ItemPackageDimensions_Length : 1.4 centimeters ItemPackageDimensions_Width : 10.9 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : diode-lasers Manufacturer : Quarton inc. Material : Stainless Steel ModelNumber : VLM-635-56 LPO-D20 NumberOfItems : 1 OperationMode : Automatic PartNumber : VLM-635-56 LPO-D20 ProductDescription : The newly developed glass line lens come with various fan angles and they produce high quality uniform laser line. Ideal for automation, machine vision, image processing, digital data acquisition, counting, precision 3D scannner and science & medical application. They are available at 10cm, 20cm, 40cm, 90cm focus length; red, green wavelength; Class I, and Class II laser class to cover within 1 meter range task. Please search by using the keywords Quarton VLM-520-56, Quarton VLM-635-56, Quarton VLM-520-58, or Quarton VLM-635-58 to find out more product options on Amazon.