Mirage Swing Mount Operatory Package (Chair/ Unit)#4000 Hydraulic professional use chair with wide back and full lumbar support, rotating armrests left or right, double articulating headrest with sliding height adjustment, 30 degree swivel from left and right of center, 4 programmable positions with automatic return and foot control. #3500 Rotating asepsis 3 Handpiece automatic control with coolant controls, fl ex arm with air brake, diaphragm block design, wet dry variable speed foot control, deluxe