Xing Laser Focus Lens for Rusty Remover Laser Machine and 4in1 Laser Machine RF-D20-F800

It is a cleaning focus lens only. For water chiller tank-based rusty remove machine laser and 4in1 laser welding machine (cleaning function only). Note: for the 4in1 welding machine, check your current focus lens draw. The old-model gun still uses the D20-F600, not the D20-F800 model. The wrong lens does not fit the draw. The lens has convex and flat sides; the convex side always faces the rear part of the gun. On the edge of the lens, it has a model mark and V direction (toward the rear side of the gun).   Does not work for an air-cooling machine laser gun. Does not guarantee works on non-Xing Laser models.