I have no experience with that hackle. What are you going to be making with it. Just remember, the lower the grade, the less smaller size hackle. If you are going to be tying dries from a 10-18 most grades of necks will do. However, the small fly guys need the gold and silver grades.
As far as the saddles are concerned you will find very little size variance on the saddle if it says sizes 14-16 that's what you'll get. You might find a few larger and a few smaller, but that's it.