Offering true height adjustment, the Nxt Optima HA features an upper panel that adjusts 16-20″ and is separate from the lower panel, which remains fixed to control the pelvis. The Optima is available in 3.5″, 4.75″ and 6.5″ contours from 16″ to 24″ wide. It offers 25° of posterior or anterior adjustment. The series is coded E2620/E2621.