Material: All metal fan leaves are also aluminum alloy material can be used up to 170 degrees high temperatureOutlet diameter: 70MM inlet diameter: 76MMMotor length 10cmApproximate parameters are as follows:Speed: thin line version of 15,000 or so Thick line about 35,000 turnVoltage: DC 7.4-16.8VMaximum current: 24AMaximum power: 380W thick line versionMaximum thrust: 1200g thick lineKV value: 3100 thick line versionWeight: 520 g