3 products Expired Ringfeder® trailer coupling 303 BR AM/RL The D-value of 320 kN makes this the perfect choice for really heavy transportation. This strong and reliable coupling is designed and built for trouble-free extended heavy-duty use. The air driven au... Expired Ringfeder® trailer coupling 5050 A/B This coupling is ideal for medium and heavy transportation and works with hinged drawbars as well as centre axle trailers with rigids, or dollies with 50 mm drawbar eyes. Its solid and well-tried cons... Expired C-Coupling RINGFEDER AM mechanism operating kit C-Coupling