Here is a link with a picture of it.
Welcome to the Quilting Board!
My BIL's wife uses swimmer's ear plugs cut in half for her crochet & knitting projects. They are just pieces of some kind of foam like the DAP Caulk stuff pictured only they come in bright colors. The caulk stuff seems like it would be more economical, though. Another reason to allow myself to be dragged along to the hardware store--LOL!
thanks for posting a pic. I learned someting new today! :thumbup: