: Best for turning a single surface into a solid with a specific thickness. Select the Thicken command from the Surfaces tab. Select the surface body you want to thicken.
To convert a surface or complex geometry into a in SOLIDWORKS (which appears to be the CAD software relevant to your file type), you can use several standard methods depending on your starting geometry. Common Methods to Create a Solid Body sc24855-SFCOE.rar
: Used when multiple surfaces enclose a volume. Go to the Surfaces tab and select Knit Surface . Select all the surfaces that form the closed volume. : Best for turning a single surface into