Safety Welding Goggles For Welding, Melting, Soldering & Brazing. This is a new pair of safety welding goggles. These help protect your eyes when welding, melting, soldering and brazing. These have 50 mm filter lenses and clear cover lenses. The sturdy nylon lens adapter holds lenses and permits simple lens replacement. Has a soft opaque frame and plastic ventilators to keep out harmful light. The shade is 5.0 and these fit over eyeglasses.