Mission Rubber 105688 MR56 88 Flex-Seal Coupling, 8-Inch Plastic/Cast-Iron to 8-Inch Plastic/Cast-Iron Flexibility - Sleeve is manufactured of molded natural and synthetic rubber Leakproof Seal - Inside surfaces of transitional size couplings are stepped to conform better to different pipe sizes Side A: 8.44-Inch, Side B: 8.44-Inch, Length: 8-Inch Corrosion Resistant - Use of stainless steel clamping bands are highly effective in a variety of environments 316 Series Marine Grade Stainless Steel conforms to ASTM A 240