The versatility of a left/right configuration with the practicality of a rear delivery. The A6420 is a full delivery head with standard 3 automatic handpiece controls, air/water syringe with quick-change tip, disc foot control, wet/dry toggle with 7' tubing, self-contained patient water system with quick disconnect. Independent coolant air and water valve adjustment, and stainless steel instrument tray and non-skid pad. Rear mount control arm with adapter kit for rear delivery with utility center and 5' umbilical. Proma units to be mounted on Royal Domain and Alliant chairs can be ordered with an internal umbilical. Please specify internal umbilical when ordering unit. Proma North units can be mounted to Biotec Pedo Benches.