VF3500 Filter Compatible with Ridgid 3-Layer Wet Dry 3-4.5 Gallon Portable Vacuum Cleaner Parts WD4050 WD4522

Nanjing Blue Sky Filter Co.,Ltd.

As a professional manufacturer of air filtering products with ISO9001 and ISO14001

 in China, Nanjing Blue Sky Filter Co.,Ltd. Produces and supplies the following items:

1. Dust bags / air filters for the vacuum cleaners.
2. Air filters for the air purifiers / air scrubbers / humidifiers / dehumidifiers
3. Grease Air Filters for Kitchen Cooker Hoods
4. Odor / Smell Absorb Air Filters for Refrigerators
5. Air filters for motors and automobiles
6. Advanced air filters for medical appliances
7. Prefilter + HEPA filters for HVAC and any other usages, such as V-bank HEPA Filters
8. Air Filters and filter bags for the industrial machines and equipment as the replacements

Our air filters are various with different shapes and materials according to the customer’s 

specifications and requirements.
And the efficiency grade is from low to HEPA 14 grade (MERV 19) according to 

EN779, EN1822 and ASHRAE.
And our technical department is ready to develop any new air filter item for residential, 

commercial and industrial use.

1. Can the product be customized?

Yes, both the product and the packaging can be customized.

2. How to pay?

Our company accepts various ways of payment, such as T/T , L/C etc.

3. How long is the delivery time?

It depends on the order quantity. USually it takes about 30 days to produce a full 20' container.

4. Do you arrange the shipment?

Yes, our company can arrange the shipment to deliver the goods according to the client's customer's requirements.

5. What about the after-sales service?

Our company is responsible for the supplied product within its usage life.