MACK ONLY STANDARD PULL UNIT INCLUDES: 15 1/2" MANUAL ADJUST PPA, INTERMEDIATE PLATE, 2 - 2" 10 SPLINE HUB - 9 SPRING - 4 PAD DISCS PLATE LOAD: 3600 LB LB/FT TORQUE RATING: 1700 DISC SPRINGS: 9 CORE #: 183 CORE PRICE: $124.00