The code SB4846101 refers to a specific industrial sewing machine part: the Thread Wiper Device Assembly for the Brother S-7300A single-needle lock-stitch machine. 

This assembly is a component within the thread wiper mechanism of the sewing machine. It helps manage the thread after it has been trimmed, preventing it from interfering with the next sewing cycle. 

You can find more information about this part, including pricing and availability, on industrial sewing machine parts supplier websites like www.globalpartsbd.com or the Brother parts book for your specific model.