The first digit of the IP rating ranges from 0-6 (e.g. IP2X) and indicates protection from solid particles like dust, that is from no protection, 0 to being fully dust resistant, 9. While the second digit ranges from 0-9 (e.g. IPX8) and indicates protection from water, that is from no protection, 0 to protection from water at high pressure and at certain depth, 9. » learn more