Mirrorless / Extension Rings / Isotta 20mm B102 Extension Ring CloseIsotta 20mm B102 Extension Ring Zoom B102 Port System20mm Extension Ring SKU: # is-0174 Price $145.00 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 DescriptionIsotta 20mm B102 Extension Ring Extension ring with 102 mm bayonet to increase the length of the housing's port by the mentioned measure and allow the use of different lenses. What's includedPort extension2 O-Ring sealsTechnical dataBlack anodized anticorodal aluminumDouble O-Ring sealMax depth 100 meters