It will protect the ports securely without rotating. Or easily attach 

macro lens with 67mm threaded, like INON UCL-330, UCL-165M67 or UN UNCU-01 Close-up Lenses to have macro photos.

Specification

• OZ scuba / 67mm threaded mount base,Can fit Any Meikon Waterproof  Underwater Camera Housing 
• Material: corrosion-resistant aluminum alloy(6061) hard anodized finish
• M67 adaptor/1pcs in Original Protective Packaging
• Not Including Housing and Lens