Each of the two NEMA sizes are offered in gear ratios ranging from 4:1 to 700:1. Their maximum input speed is 6,500 rpm. Their single stage, double stage, and triple stage minimum efficiencies are 95%, 90%, and 85% respectively. Operating temperatures range from -40 to 121°C. The housings are made of stainless steel, with anodized aluminum mounting flanges. The output shafts are made of stainless steel and the gears are made of alloy and stainless steel.