The Fisher Rosemount KJ4003X1-BF1 Left Vertical Carrier Extender is a replacement component for the KJ4003X1-BF1 carrier assembly, identified by part number 12P3839X022. It provides added reach on the left vertical carrier to support proper alignment within the carrier system. This extender is used with the KJ4003X1-BF1 configuration to maintain correct mounting geometry within the carrier assembly.
