The file 'Sanding Detailer (Spring Loaded For Mini Sander Belts) 3D Printer Model' is (stl) file type, size is 6.4KB.
I wanted this sander but didn't want to pay $6 for the actual sander part so I just purchased the belts and modeled this around these:
https://www.amazon.com/dp/B01IRLEALI/ref=cm_sw_em_r_mt_dp_U_uHvsEbQ2TMASE
Using those yellow 3D printer bed springs:
https://www.amazon.com/dp/B07SCYM119/ref=cm_sw_em_r_mt_dp_U_9OvsEb1H3GHA7
If you'd like to print these separately to fit on a smaller bed in Simplify 3D go to Mesh > Separate Connected Meshes.
SandingDetailer.stl | 29.2KB |