A tiny snap-fit clip that holds two cables together, fully customizable for any cable combination. Enter the diameter of each cable and the clip automatically sizes both channels, the snap-in opening, and the outer wall to fit. Perfect for bundling a keyboard and mouse USB cable, pairing a charging cable with an audio cable, or tidying any two wires that run the same path.

The design is a C-clip cross-section extruded along the cable length. Two circular channels sit side by side inside a smooth hull-shaped outer wall, with a shared snap-in entrance at the top. A small bridge nub between the channels keeps cables separated. The clip snaps onto both cables at once and holds them by friction. All dimensions are parametric -- adjust cable diameters, wall thickness, clip length, snap tightness, and bridge width to match your exact setup.

Prints in seconds with no supports. Use the MakerWorld customizer to dial in your cable sizes, or just use the defaults for a 3mm + 3mm pair. 

I just used the standard 0.2mm Standard quality preset.