Does this fit in an iPhone using a lifeproof case?

So I recently got a lifeproof case for my new iPhone 5S and none of my previous attachments fit the phone strictly because the life proof case is too tall at the headphone jack. Would this attachment help fix that problem with this product or do I simply need to get a new case?

Belkin Audio Splitter (3.5mm-M/2x3.5mm-F)

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