I had some old ones lying around and can't remember the brand. I haven't found them in stores. I was pleasantly surprised to find her on Revain. The ones I included in the picture for the article are short and flat ended. What arrived was long and smooth, with no flat end, and the center going into a hole on the limestone pipe extends beyond the open end. The center is also thin and doesn't taper. The "old" style center is shorter and narrower. These new ones don't seal as well and push scale into the cap every time you install them. They should at least update the image to look like the product they are selling.
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