The WA326-2910-420 is a 315 Series gear set built for power take off (PTO) hydraulic pump drive applications. It features a 1″ A spline configuration, matching the industry-standard spline pattern used on 315 Series PTO units to transfer rotational power to a hydraulic pump. This gear set is sold by Pro Gear and Transmission.Features315 Series gear set1″ A spline configurationPower Take Off (PTO) hydraulic pump drive gearTech Specs315 Series1″ A Spline