hks is reusable.
Its a little lose but i haven't had any complains from the G37 comunity which uses the same exact filter.
If you guys want an alternative:
AFE makes the pro-dry s filters also. They are also reusable and has OEM fitment.
here's some pictures and the link to our website if anyone wants to order
Amplified Motorsport - AmplifiedMotorsport.com - performance audio auto accessories