SFX Laser 10 pcs Laser Protective Lenses for SFX 1000W/ 1500W/ 2000W Laser Cleaning Machine. SFX customized protective lenses for longer service life!! Laser Protective Lenses for SFX Handheld Laser Cleaning Machine. Size: Diameter: 43mm; Thickness: 2mm.Material: Quartz with double-sided coating. Application: Apply to SFX 1000w/1500w/2000w fiber laser cleaning machine. Package: 10 pcs in one pack.