These are Vibration Dampers,Rubber Antivibration feet&Rubber mat.It can effectly absorb the vibration when air conditioning is working,thus keep the system silent,quiet,and steady.So can effectly prolong the service year of A/C.We have abundant experience to make all sorts of the Vibration Dampers for other machines and the related system.Don`t hesitate to send us your sample or drawings,we can make them according to your requirements.