Heat Seal Filter Paper (16.5gsm-45gsm)It has many usage, different gsm has different usage. 16.5gsm, 18gsm, 21gsm, 23gsm filter paper mainly used to pack tea. 28gsm mainly used to pack coffee. 38gsm 45gsm mainly used to pack ......

FOOD GRADE TEA BAG FILTER PAPER HEAT SEAL PAPER: 16.5GSM -28GSMNON HEAT SEAL PAPER: 12.5GSM......