The 90PP is a 12Volt agitator with paddle higher in the basket and designed to be used in tanks with more water. The 90APP is a 12volt agitator with paddle lower in the basket and designed to be used in tanks with less water. Fan-cooled, 3,000 rpm, 1/20hp, 5 amps with spinner stop. Large splash washer on shaft underside of motor. Stout paddle with 5/16" shaft, heavy-duty bearing insert in bottom of 10 1/2" x 4" basket. Band around top of basket for reinforcement and longer life. Arrow on motor to indicate proper direction of rotation, which is a MUST. Factory service life of unit is approximately 2,200 hours.