N200 Macro Port 40 ~With M67 ThreadThe Macro Port 40 is designed for housings supporting the N200 Port System. The front of the port has integrated 67mm threads for accessories. Check Port Chart for all supported lenses. Technical Specifications Depth Rating 100m Port System N200 Weight Port Opening Diameter Port Diameter Body Material Anodized Aluminum Alloy Port Material Optical Glass Port Coating Port Shade Material Removable Port Shade Spare O ring split Support & Downloads Port