Perfume bottle has a zamak perfume cap,the zamak perfume cap has a pp insert inside. And perfume bottle neck installs a spray pump with collar.As a result,the size of PP insert must fit the spray pump collar very well.Meanwhile manufacturer also need the bottle to test the pull strength of the zamak perfume cap.This is why manufacturer of zamak perfume cap always asks customer for perfume bottle when they produce caps even at sampling process.
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