Help with kitchen spout assembly

Hi. Can someone tell me how to identify the brand of a kitchen faucet. I looked on the faucet itself (just the outside and not underneath the sink) but I can not identify the manufacturer. I am looking to replace the spout assembly. I understand from searching online that there are different lengths for the arm. However, are they universal sizes that can fit any manufacturer? Thank you.Attachment 43841 (http://www.doityourself.com/forum/attachments/toilets-sinks-showers-dishwashers-tubs-garbage-disposals/43841-help-kitchen-spout-assembly-faucet.jpg)