It looks like a specialty tip to make shells. http://shop.cakecentral.com/specialty-tips-p-467.html?cPath=34_35
http://www.wilton.com/store/site/product.cfm?id=3E30E4F5-475A-BAC0-59A428910513993E&fid=3E332521-475A-BAC0-50460A94EBF2A50F
Here's the link to tell you what tip 98 is. It's easier to look then to try and explain it. It kind of looks like a shell type.
It looks like it is for shells. I checked out the pic in the cakecentral.com shop.
ok, i googled it and wilton says it is for shells, ropes, hearts, christmas tres, and ring candle holders. hope this helps.
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