The FAAC 390043 Shaft Extension offers 3.15 inches of additional length for the 950 BM door operator, allowing for more versatile installations. Made from high-quality materials, it ensures smooth operation and reliable performance. The shaft extension is designed for precision and durability, providing a secure and reliable extension for your door operator. It is an essential accessory for enhancing the flexibility and installation options of your door operator, providing a reliable solution for extending the shaft.