This Nauticam Macro Port 94 is designed for housings supporting the N120 Port System. The front of the port has integrated 67mm threads for accessories.
Dimension: Diameter: top 67 mm; bottom; 132mm; Depth rating: 150m Construction: Hard anodised aluminum alloy Glass material: optical BK-7 (Dia: 65mm; Thickness: 8mm) With standard 67mm thread for close up lens.