Mirrorless / SLR / Pro Video / Extension Rings / Sea & Sea DX Extension Ring 40L CloseSea & Sea DX Extension Ring 40L Zoom MDX Port System40mm Port SystemDepth Rating: 100m / 330ft SKU: # ss-30145 FREE Standard Shipping to USA / Canada! Price $299.95 Options Back Item IncomeAccount TaxCode Mapping UDF1 UDF2 UPC Code Pick Up Tax Amount Quantity -+ Add to Cart Add to Cart Custom Options Price as Configured Add to Cart View Cart Articles & Videos About This Item ALL ARTICLES ALL VIDEOS Overview / Product DescriptionSea & Sea DX Extension Ring 40LSpecifications[Dimensions (DIAxD)] 132x55mm / 5.2x2.2inches[Weight] Approx. 280g / 9.9 oz[Depth rating] 100m / 330ft[Construction] Corrosion-resistant aluminum alloy