[size=11.0pt] Hello![/size]
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[size=11.0pt] Our Engineers have not yet tested the Harmon Kardon 720 earphones for compatibility with our tips, so for now I wouldn't be able to recommend which of our Comply™ Tips would be a good fit.[/size]
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[size=11.0pt] We actually purchase and test each earphone model that we have listed as compatible on our website. More than diameter will determine fit and retention for tips to devices. The material that the sound port is made of, if it has a “cuff” or a groove, if it tapers, domes, bells, is all or partially plastic, metal, wood or other material ….. all of this plays a part in how our tips fit. [/size]
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[size=11.0pt] I did request that we add the Harmon Kardon 720 earphones to our list of earphones to purchase and test, so please check in with us. Once a device has been purchased, it can take approximately 2-4 weeks for receive and test an earphone.[/size]
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[size=11.0pt] Best Regards![/size]
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[size=11.0pt] Mary @ ComplyFoam[/size]