The file 'Square Hood For Sigma 18-50mm F2.8 Lens 3D Printer Model' is (stl) file type, size is 195.6KB.
I scanned the lens hood on my printer since I didn't have a caliper at the moment and traced the original, it might be at 1:1 or it might not, have that in mind if you want to print this
SQUARE_HOOD.stl | 534.8KB |