DC5-7.4V Mini 370 Motor Air Pump Self-Priming Pump Negative Pressure Vacuum Pump Features: 370 self-priming pump,the end of the pump has been welded with JST plug silicone wire. Plugged directly into the receiver tee. Used for water cooling of electric motors for boat models. Water is sucked into the boat chamber connected to the copper water cooling ring to cool down the motor. The motor pump is used as water cooling above the boat for 15MM 26MM 40MM caliber push water DIY Specification: Product name:370 self-priming pump (small water flow, loud sound) Voltage range:can be directly powered 5-7.4V The weight of the pump is about 62 grams. Material:plastic gear pump Use water pipe size:water outlet caliber 4.2 can be matched with the inner diameter of 3-4MM water pipe(package does not include water pipe) Package includes: 1*Mini air pump Note: Only the above package is included Please allow for minor deviations due to manual measurement. Due to the difference between different monitors,the picture may not reflect the actual color of the item. Product with LOGO