Marklin 70228 - Wire Section 228 mm / 8-31/32" (24430)
Made of welded steel wire. Length 227.5 mm / 8-31/32”. Designed for curved routes with 579.3 mm / 22-13/16” radius (C Track). Yes, R-4 like the 24430 pieces.
For a circle, 16 contact wires are required, each with 22.5°.
Set with 5 wires.