1.material: choice PE(polyester) needle felt PP (polypropylene) needle felt.
2.micro rating:0.5-200
3.size:7''*17'',7''*32''

1.       material:  choice PE(polyester) needle felt PP (polypropylene) needle felt.

2.       micro rating:0.5-200

3.       collar type: steel ring or plastic ring

4.       construction: welded

5.       welded method: welded added heat seam

6.       surface treatment: singeing and heat set