Sea & Sea Compact Macro Port 52

Sea & Sea Compact Macro Port 52[Dimensions (DIAxD)] 102.5x68mm / 4.1x2.7inch[Weight] Approx. 259g / 9.1oz[Depth rating] 100m / 330ft[Construction] Corrosion-resistant aluminum alloy (alumite coating) + Tempered glass[Distance] Between the mount and the inner glass surface: 38.5mm / 1.5 inches