Description: The white fan is mainly used for exhaust ventilation, which is usually used in incubators, and can also be installed in other places for exhaust ventilation. Black type mainly used for ventilation generally used in small incubators. The blue axial fan is mainly used for ventilation. It is usually used in large incubators. The noise is low and the air volume is large.Power saving and durability. Function:Remove dirty air from the incubator machine and adjust temperature / humidity. Specification: Material: Plastic Color:White/Black/Blue Frequency:50Hz Voltage:AC 220-240V White S Power:28W White L Power:33W Black Power:19W Blue Power:65W Size Chart: White S Size:23.5x23.5cm/ 9.25x9.25inch, backside Size(LWT):9x9x15.5cm/ 3.54x3.54x6.1inch,Wire Length:65cm/ 25.59inch; White L Size:29.3x29.3cm/ 11.54x11.54inch, backside Size(LWT):23.5x23.5x13.5cm/ 9.25x9.25x5.31inch,Wire Length:65cm/ 25.59inch; Black Size:12x12x4cm/ 4.72x4.72x1.57inch,Wire Length:31cm/ 12.2inch; Blue Size:21.5x21.5x7cm/ 8.46x8.46x2.76inch Package Includes: 1 Piece Egg Incubator Air Fan Note: Please allow 1-3mm error due to manual measurement, make sure you do not mind before you bid. The colors may be different for the different display, please understand.