Nauticam Port O-Ring for Zen 170?

Hi,

I want to replace the blue o-ring of my Zen DP170 which I ise with Nauticam D800 housing. Can I use the grey Nauticam 120 o-ring as replacement?

Regards, Sascha

Nobody an idea? I thought that they should compareable? If not, where can I buy the zen port oring?

Yes, they are the same size.

Thanks Walt!

Best regards, Sascha