I would give 5 stars for the quality. "up to 1/2" includes everything. Description would be better worded than fittings with screws 1/4", 3/8" and 1/2" and tube outside diameter. For my purposes (7/16 inch screws) they are not suitable. The medium size is too small and the larger size is too big. I'll eventually find a use for it, but I'll place another order for caps that are more accurate for my application. .Live and learn. . . .
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