70x70 Fresh Air cooling ventilation fan water resistant dc fan 7025 12v greenhouse dc fan
1. What’s the difference between the sleeve and ball bearing fan?
Sleeve bearing | Ball bearing |
low price | high price |
made in China | NSK ball imported from Japan |
low noise | stable noise level |
2-3 years lifetime | 5-8 years lifetime |
10.000 hours warranty | 30.000 hours warranty |
2. What kind of function can we choose for fan?
3. How long can your wire length be ?
4. What’s your MOQ and delivery date ?
5. What’s your payment terms ?
6.What kind of transportation can we choose ?
7. What’s your packaging?
8. What information should be provided before place an order?
70x70 Fresh Air cooling ventilation fan water resistant dc fan 7025 12v greenhouse dc fan