Sealey Welding Helmet Auto Darkening - Shade 9-13 - BlackWelding helmet with adjustable shade control between 9 13. Complies with BS EN 379, BS EN 175 and DIN standards. Features True Colour technology for improved visibility, less eye strain and realistic colour recognition. Fully automatic switching from light to dark on striking arc. Shade is selected by a rotary knob on side of helmet. Grinding function enables user to grind without removing mask. Solar panel power supply. Features sensitivity and delay