Speedglas welding filter 9100X: variable dark shade 5, 8, 9-13 for most types of arc welding The big (17 x 10 cm), clear protective visor is curved, with excellent views up, down and peripherally. Delay function to set the dark-to-light opening time. Possible to lock-in any shade, e.g. in the light state 3 when grinding Switching time (light-dark) 0.1 ms. The sensitivity of arc detection can be adjusted for unsurpassed swithching reliability Tack welding comfort mode help minimize eye strain during extended tack welding applications With the right type of filter, the Adflo respirator effectively protects you against both particles and gases - all in one system The slim profile and ergonomic design makes it even more lightweight and easier to go into tight welding spaces . Gas filters are sold separately. You can selectively replace either the particle or the gas filter as needed: you don't need to change both filters at the same time. With the right type of filter, the Adflo respirator effectively protects you against both particles and gases - all in one system Large, curved protective visor with excellent views up,down and peripherally Ergonomically designed head suspension Fits with 3M™ PELTOR™ Welding Earmuff H505B