The 3M Speedglas 9100XXi Auto-Darkening Welding Filter is a high-quality, durable filter that provides excellent protection for your eyes while welding. It features a large viewing area of 73mm x 107mm, which provides a clear view of your work. The filter also has a fast switching time of 0.1ms, which helps to protect your eyes from sudden flashes of light. In addition, the filter has a variety of features that make it ideal for a variety of welding applications, including: Dark shades 5, 8, and 9-13 for MIG, TIG, and Stick welding Grinding mode for grinding operations Cutting mode for cutting operations Tack welding comfort mode for minimizing eye strain during extended tack welding applications Delay function for setting the dark-to-light opening time Adjustable sensitivity for arc detection The 3M Speedglas 9100XXi Auto-Darkening Welding Filter is a great choice for professional welders who are looking for a high-quality, reliable filter that will protect their eyes while welding.