Plastic Filter Disc 1. PP material filter disc 2.micron:5,20,50,80,100,120,150,200,300,450,500 3.various colors 4.durable Plastic Filter Disccharacteristics :1. PP material filter disc2.micron:5,20,50,80,100,120,150,200,300,450,5003.various colors4.strong wear resistance Plastic Filter Disc