Sealey PWH Series Auto Darkening Welding Helmet Shade 9-13 Range - Sealey PWH4, Welding helmet with infinitely adjustable shade control between 9-13. Complies with BS EN 379, BS EN 175 and DIN standards. True colour technology for improved depth perception, allowing far greater welding precision. 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 - no batteries required. Features sensitivity and delay controls for switching light to dark. Suitable for MIG, TIG, arc welding and grinding. Sealey PWH4 Auto Darkening Welding Helmet Shade 9-13 - Yellow