[CR] Talking about discovering new things thanks to eBay...what is this thingie?

(Example: Events:Eroica)

Date: Thu, 4 Oct 2007 15:20:51 -0700 (PDT)
From: Raymond Dobbins <raydobbins2003@yahoo.com>
To: Classic Rendezvous Bike List <classicrendezvous@bikelist.org>
Subject: [CR] Talking about discovering new things thanks to eBay...what is this thingie?

TA Stem Mount Brake Cable Guide, item # 280157957940.

http://ebay.com/<blah>

Anybody have a photo showing one of these in action?

eBayRay Dobbins
Miami FL USA