... are made up of pleated polyester filter media for low pressure drop. PP melt blown filter cartridgeUpdated Time: 2011-9-71.) Brief ... Introduction Standard filter cartridges are made up of pleated polyester filter media for low pressure drop,this design will ... 115 Inside Diameter(+1mm): 27mm3.) Main performance a.Precision & Flow Filter precision(μm) :1,3,5,10,20,30,50 Flow ...