Terminal W, Voltage 14, Amp 145, Pulley w/o, Bracket Hole Size 1 13.00, Prod. info BN, Bracket Hole Size Rear 13.00, Holder Arm Width 14.00, Servicing Kenworth, Mack, B+ M8, Radius 2 99.00, Mounting Bracket Distance 101.00, Radius 99.00, Belt Adjustment Bracket Hole 1 1/2" UNC, Regulator type IR, Remarks Replacing: 21SI. Negative grounding. One-wire system. B+: 5/16"., B+ Position 53, Belt Adjustment Bracket Hole Position 60, Total Length 217.00