I am trying to convert the Hoffman website listing of 3D stp files to my Solidworks, Version 2013x64 edition. Using Windows 7. I get it downloaded into    f1212t36hc.stp

The website for the file is: I click on 3D step

Hoffman: Product Catalog : Cable and Wire Management : Hinged Cover Wiring Trough, NEMA Type 12

What can I do to use their files rather than model each one.

Another file I have the same issue is

Hoffman: Product Catalog : Mild Steel : CONCEPT™, Type 4 and 12