The file '1.5 To 1.75 Tube Clamp Spacer 3D Printer Model' is (stl) file type, size is 9.9KB.
I bought an intercom headphone hanger for my UTV's cage and assumed the 1.75" clamp I ordered would fit the 1.5" crossbar I wanted to mount it to. It didn't, so I made a spacer for it.