NB411 Clutch NB411 OD: 75mm Aluminum This clutch is designed with an outer diameter of 75mm and constructed from aluminum material.It is engineered to fit applications requiring the NB411 specification.The unit provides engagement and disengagement for mechanical power transmission in compatible systems.Its aluminum construction contributes to reduced weight while maintaining structural integrity.The design supports consistent performance under standard operating conditions. Compatibility Disclaimer: This is an aftermarket replacement part.Any brand names or model designations mentioned are used solely for the purpose of demonstrating compatibility.