* These rubber damper balls can effectively help to reduce the sensitivity of flight controller,is a must have item for every
pilot who pursuit of extreme flight
* Use for the newest F4 F7 flight controller on FPV quadcopter frame to prevent vibration
* Made of high quality rubber for lasting performance

silicone rubber duckbill one way check valve stopper for Liquid and Gas Backflow Prevent * When installing the check valve special attention should be paid to the direction of flow of the medium and the normal flow direction of the medium should be consistent with the direction of the arrow indicated on the valve body otherwise the normal flow of the medium will be cut off. Opening the pressure is small generally open 1-5KPA pressure liquid or gas it can open, good sealing Easy to install.

We are a leading manufacture of the rubber sheet in China,