Application: Briggs & Stratton Various Models - Twin cylinder14HP Horizontal / Vertical 16HP Horizontal18HP Horizontal Replaces OEM: Briggs & Stratton : 399928, 495100, 498148.Description: 12V, CCW, PMGR, #teeth: 16 Gear OD: 40.3mm / 1.587"Mounting Hole#1: 8.3mm ID Unthreaded #2: 8.3mm ID Unthreaded #3:10.3mm ID Unthreaded Weight: 5.595lbsHeavy Duty version of 80-60-211