Ex-mark: Ex eâ ¡T4/T5/T6 DIP A21 TA, T4/T5/T6 Intended use: Can be used in zone 1 and zone 2 Can be used in zone 21 and zone 22 Degree of protection: IP65 Ambient temperature use: -40âÂÂ≤Ta≤55â (40âÂÂ) Material of enclosure: Glass fibre reinforced polyester (SMC) of static resistence