Always a pre-production sample before mass production; Always final Inspection before shipment;

Yes, we are manufacturer with our own factory. And we specialized in filtration for 20 years.

Yes. Except for standard sizes, we also make filters according to customer's requirement. 

Melt Blown Water Filter Cartridge is used for the front filter cartridge to protect others. It is made of polypropylene material without any chemical glues. And it is widely used in Pre-Reverse Osmosis, Food & Beverage, Electronics Metal Finishing, Oil & Gas and Fine Chemicals. 

Yes, we try to meet your requirements. 

These terms mean the same and are used interchangeably.

Yes - temperatures over 35 ℃ and humidity over 75% will reduce the filter life.