Offset closed Brep in grasshopper

Hi everyone, I’m new in Rhino and I cannot find a solution to the following problem: I have a closed Brep representing a fish shape and I want to create an offset in order to create a solid shell. I have used Sasquatch plug-in to make the offset but i have a problem to represent the two closed Breps as a unique solid. Can anyone help me to figure out this task? thanks

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