filter bag: Material: polyester micron rating: 0.5-200 ring type :steel ring or plastic ring ring construction: welde

  HL FILTER, the biggest manufacturer of liquid filter bags in China.

 Material: Quality Polyester needle felt, polypropylene needle felt Micron rating: 0.5 -200Construction: weldedCollar type: steel ring or plastic ringwelded method: welded added heat seemSurface treatment: singeing and heat setHL STRAINER FILTER develops welded added heat seem to double protect filter bags from damage in  seems.  Bottom seams are 100% welded, both strong and flexible, allows the filter bag to conform to the shape of the retainer basket creating support as differential pressure builds. Welded construction can completely eliminates unfiltered liquid bypass from occurring due to needle holes.

PP filter bag