Siegen welding helmets auto darkening shade 9 13 11 sealey pwh600 a b welding helmet b from b sealey b with a high quality infinitely variable shade 9 13 lens manufactured and tested to bs en 379 fully automatic switching from light to dark on striking arc fitted with solar power panel no batteries required features adjustable sensitivity and delay switches grinding function enables user to grind without removing mask deluxe contoured helmet approved to bs en 175 which gives full