friction disc for forklift size:139.2*98.6*3.0/OT54 High friction coefficient Low fading competitive price ,perfect quality performance and parameter of steel mating plate materialhardness(hrc)angularity(mm)surface coarseness45#65Mn37-4745-50Φ100-Φ250 0.10Φ250-Φ350 0.15Φ350-Φ450 0.25Φ450-Φ550 0.30 √3.2-√0.8 FRICTION DISC 505-971-578 FOR YALE FORKLIFT