Sea & Sea Compact Macro Port 79

Sea & Sea Compact Macro Port 79[Dimensions (DIAxD)] 102.5x95mm / 4.1x3.8inch[Weight] Approx. 298g / 10.4oz[Depth rating] 100m / 330ft[Construction] Corrosion-resistant aluminum alloy (alumite coating) + Tempered glass[Distance] Between the mount and the inner glass surface: 65.5mm / 2.6 inches