This Sensor/actuator connector (part number 1521575) by PHOENIX CONTACT is a universal 4-position plug with a straight M12 SPEEDCON design. Featuring an A-coded insulation displacement connection, this connector is made with high-quality zinc die-cast material that is nickel-plated for durability. It is suitable for use with external cables with a diameter ranging from 3.5 mm to 6 mm.