The finish is black oxide and the length in the picture is 4.025" which is standard for the current C or D series blower. Be sure to measure the quill shaft or know what model blower you have when ordering.
These come from a very well funded pro extreme team that cycles them out on a regular basis giving another racer a great opportunity for a spare. Good to have in the trailer as you just never know when you are going to need it.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.