Precor EFX 423 Precision Series Elliptical Crosstrainer Precor introduced the very first elliptical in1995 and has been the global leader in elliptical manufacturing for over 20 years Health club quality workout at home Patented design provides a smooth, natural feel and keeps your body in a comfortable, posture-perfect position for the duration of your workouts A true cross-trainer with multiple ways to change the exercise to maximize muscle recruitment while building cardio endurance See chart below for Precor full line of Precor Ellipticals