Deceleration Multiple (optional): Reduction Ratio 5K, Reduction Ratio 7.5K, Reduction Ratio 10K, Reduction Ratio 15K, Reduction Ratio 20K, Reduction Ratio 25K, Reduction Ratio 30K, Reduction Ratio 40 K, Reduction Ratio 50K, Reduction Ratio 60K, Reduction Ratio 80K, Reduction Ratio 100k.