50 round connecting nuts M4x0.7, 4 mm long, made of 304 stainless steel, robust, for maintenance

Features:1.Standard modular structure, guide rail type installation
2.Real-time monitoring of DC overvoltage and undervoltage faults
3.No additional auxiliary power supply required
4.Overvoltage and undervoltage values ​​can be adjusted
5. 79 * 23 * 79 mm / 3.1 * 0.9 * 3.1 inches
Weight: 200 g / 7.1 oz (approx.)

Package List:
1 x Overvoltage and Undervoltage Protector
Note:
Please note that the new and old types of this product will be sent randomly, and make sure you don't mind this before ordering.