... ,103mm,114mm,125mm,140mm,etcBasic weight:16.5gsm,18gsm,21gsm,22gsm,23gsm,25gsm,28gsm,etc Inner size:3 inch,outer diameter:16 ... ,it applied the advanced incline forming technology with double-layers and unique pulp treatment system,which achieved the capability of PS ... filter paper ,for fast taste coming out,and for low tea power leakage.The main material for PS ...