... 30USDRange :20cm-200cmLayer :one ,two ,three layers Filter cartridges filter cartridge performancegas filter , simple technology, good air permeability,even filtration, ... recovery rateconvenient installation, high efficient , long working time filter cartridge usagesuitable for filtration of petroleum, chemicals, minerals, food, ... 0.10,0.15mm,0.20mm,0.45mmThe weight :10cm,15cm,20cm,30cm,40cm,50cm,60cm, ...