Pinion/Splines OD: 43.7mm / 1.720in. Mounting Hole 1: 13.0mm ID Unthreaded. Mounting Hole 2: 13.0mm ID Unthreaded. Isuzu: 4LB1, 4LC1, 4LE1, 4LE2. Fit for follwing models. John Deere Excavator: 50ZTS. John Deere Mower: 3325, 3365. We will be happy to resolve any issues you may have in a cordial and friendly manner.