3M Speedglas Auto-Darkening Welding Filters (ADF) - 100 - 750020 Features: Variable dark shades 8-12 Light shade of 3 Light-to-dark switching time of 0.1 ms Possible to lock-in the light shade state, for example when grinding Delay function allows you to set the dark-to-light opening time Viewing area: 44 mm x 93 mm UV/IR Protection: Shade 12 (permanent) Benefits: Protects your eyes from harmful UV and IR rays Provides a clear view of your workpiece while welding Fast switching time for a smooth welding experience Lock-in feature for grinding and other non-welding tasks Delay function for extended dark state after welding Large viewing area for a wide field of view Applications: MIG/MAG welding Stick welding TIG welding Grinding Other non-welding tasks Specifications: Model: 3M Speedglas 100V Part Number: 750020 Dark Shades: 8-12 Light Shade: 3 Switching Time: 0.1 ms Delay Time: 40-250 ms Viewing Area: 44 mm x 93 mm UV/IR Protection: Shade 12 (permanent)