for forced ventilation type RBK Bg. 63-180-S 220-275 V D / 380-480 V Y, 50 Hz 220-310 V D / 400-525 V Y, 60 Hz 2-pole version according to technical specification Protection class IP 66, sealing material without silicone with flattened shaft dim. 19/8/6, Front thread M3, min. 6 mm deep