The plate is not round as shown in the product image and test photos. It's actually an oval shape. It was important because the screw positions on my American Standard coarse cleaning valve are at 12 and 6 o'clock. This only works if the valve threads are at 2 and 8 o'clock, otherwise the plate will not be straight due to its oval shape. It's also a cheap piece of plastic. If I could only find a round version it would fit my old vintage late 1980's American Standard guitar valve.
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