Sea and Sea #30123 Extension Ring 20L
- Dimensions: 129 x 35.5mm / 5.1 x 1.4 inches
- Weight: approximately 154g / 5.4 oz
- Depth rating: 100m / 330ft
- Construction: corrosion-resistant aluminum alloy with alumite coating
- Extends 20mm / 0.8 inches (with port lock)
