Ex coupling for zone 1/21, 16 A, 2-pin, 42 V, 12 h, cable entries: 1, polyamide, cable entries/housing holes: Ø 9 - 17 mm, housing material: polyamide, rated voltage: 50 V AC, frequency: up to 400 Hz, rated current: 16 A, marking according to 94/9/EC: Ex II 2 G Ex ed IIC T6 / Ex II 2 D Ex tD A21 IP66 T80 °C/T95 °C, EC type examination certificate: PTB 99 ATEX1039, permissible ambient temperature: -20 °C to 40 °C, dimensions (L x W x H): 230 x 71.5 x 69 mm, weight: 0.7 kg, protection class: I, protection type according to EN 60529: IP66,