kanyka 3 Pcs 9v DC Air Pump and 3 Pcs Push Switch Micro Controller Board Electronic Hobby Kit

best quality micro-pump is mainly used for medicine, gas analysis sampling, instrumentation and other fields. Completely maintenance-free, and no oil pump, do not pollute the transmission medium. small, stable and reliable, hand-held instrument for pump-priming, low noise, low power consumption. Especially suitable for high environmental requirements. specification: _material: plastic, metal, electronic part.