This part is yet untested in an actual piano, so please purchase only if you want to be a beta tester.
This replacement pedal spring bushing is for upright pianos with tubular (round) trap levers. The bushing goes between the spring and the lever.
The bushing works with pedal springs up to 23mm outside diameter, and has a 5mm hole in the center.
The flexible TPU material will never crack or break. The softer material is likely to help prevent creaking noises, but a light coating of synthetic grease or paste lubricant is recommended just in case.
The part was modeled after the bushing in a Samick upright, but is likely to fit many other pianos.
Image of the original (broken) bushing: