DC Cooling Fan,

HUI TONG DC COOLING FANS HAVE THE MODELS:
length(MM)*thickness(MM)
2507,2510,3007,3010,2510,4007,4010,4510,4020,4028,5010,5015,5025,6010,6015,6020,6025,7010,7015,7025,8010,8015,8020,8025,9225,9230,12025,12038,17251

HTD2507,HTD2510,HTD3007,HTD3010,HTD3510,HTD4007,HTD4010,HTD4510,HTD4020,HTD4028,HTD5010,HTD5015,HTD5025,HTD6010,HTD6020,HTD6025,HTD7010,HTD7015,HTD7025,HTD8010,HTD8015,HTD8020,HTD8025,HTD9225,HTD9230,HTD12025,HTD12038,HTD17251
Bearing Type:Ball Bearing,Sleeve Bearing
Voltage:5V/12V/24V/48VDC
Certificates:UL,TUV,ROHS,CE
Function:PWM,FG,RD,waterproof can be add on these fans

1) Dimension(L*W* H) :
A1)25*25*07mm  a2)25*25*10mm    
B1)30*30*07mm  b2)30*30* 10mm  b3)35*35*10mm
C1)40*40*07mm   c2)40*40*10mm  c3)40*40*20mm   c4)40*40*28mm  
D1)45*45*10mm
E1)50 *50 *10mm  e2)50*50*15mm  e3)50*50*25mm  
F1)60 *60*10mm  f2)60 *60 * 15mm  f3)60*60 * 20mm  f4)60 *60 *25mm   
G1)70*70 *10mm  g2)70 *70* 15mm  g3)70*70*25mm 
H1)80*80*10mm  h2)80* 80*15mm   h3)80 *80*20mm   h4)80*80*25mm 
I1)92*92*25mm   i2)92*92*30mm   
J1)20*120*25mm  j2)120*120*38mm  
K1) 172*161*51
2) Rated voltage: DC 5V, 12V, 24V, 48V 
3) Type: ball bearing, sleeve bearing
4) Safety Approvals: CE, TUV, UL, CUL, CCC
Function:PWM,FG,RD,waterproof can be add on these fans
5) Electric strength: 1mAmax at 1000VAC for 1 min between lead wire and frame.
6) Insulation resistance: 10M ohm between lead wire and frame(DC 500V)
7) Life expectancy (ball bearing):50,000hrs rain at 25 degree C relative humidity 65%+/-20%
8)Life expectancy(sleeve bearing):＞30,000hrs rain at 25 degree C relative humidity 65%+/-20%
9) Operation temperature: -10 to 70℃
10) Storage temperature: -40 to 75℃
11) Lead Wire: UL1007 (AWG18-30)
12) Protection: Motor protection and polarity protection
13) Plastic Material: Black PBT(UL 94v-0)glass filled
14) Frame: Plastic   Impeller: Plastic
15) Function: Function type is optional