1.Fan size: 50*50*10mm, 40*40*10mm 2.Voltage:5VCD ... ,5000rpm 4.Factory direct price Aluminum extrusion heat sink,heatsink radiator,cooling fin1.Fan size:50*50*102.Voltage:5VCD3.speed: 4500 ... inquiry,feel free to contact us. aluminum extrusion heat sink,heatsink radiator,cooling fin