well this is an old one! Yeah I bought some on ebay from ztackle. which im assuming is you zimmerman. Nice service good prices! haha!
clear plastic blades fill a small niche where you want a different look and thump as compared to metal blades. they do not thump as hard. They are mostly preferred in ultra clear water for lure shy fish. I know that they have been used on spinnerbaits by tournament bass anglers in clear water looking for an edge. I wanted some to try for erie eyes on harnesses. I never got around to using them though. I will try for sure first chance i get. I did use them on a spinnerbait for bass though and caught a few. its strange to see your spinnerbait thumping along with no visible blade at all. It makes the arm of the spinnerbait and the swivel look rediculous!