The original, tried and tested tube applicator system PhD is the safest wax system, reducing the possibility of cross contamination between clients.With PhD the simple things make all the difference. PhD applicators have a gate mechanism to prevent wax from re-entering the tubeand the tube is held at 45° angle in the booster chamber so there is no chance of any wax flow back. As well as being hygienic the PhD system also offers a professional, quick and easy wax, with a less painful hair removal for the client