Umbrella ferrule for double ribs

The plastic cap, known as the ferrule, is located at the top end of the paired ribs of big umbrellas.

These double ribs, which run parallel to each other, provide additional strength and stability to the umbrella's frame. The fabric is securely sewn onto this ferrule, ensuring that the canopy remains taut and properly supported.

Preferably print in PETG, 100% infill.