Product Description Mh Pin Shaft Universal Steel Trailer Rigid Flexible Couplings Product Description     MH coupling 1. Made of high grade cast iron. 2. NBR rubber material: excellent oil resistance, similar to TM, ACM and fluororubber. Good wear resistance, heat resistance, aging resistance and air tightness. Basic acid-base resistance. 3. Working temperature: – 40 … Continue reading China best Mh Pin Shaft Universal Steel Trailer Rigid Flexible Couplings