1. 2.Hydraulic fan is the fan between oil- fan and ball fan. 3.Operating voltage for option:12V Length: 1meter Workin temperature:-190° C to 280° C Material:plastic colour:Photo Color Package Contents: 1 * 4010 Hydraulic Turbine 1 * PTFE tube*1 meter 4 * 8*25 spring 4 * screw 4 * nut Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real . The measurement allowed error is +/- 1-3cm.