... , 125mm 3 widely used for teabag and coffee filter paper tea is heat sealable, environmental-friendly bleached1, Weight range: 16gsm-40gsm ... toxic, tasteless, good ventilation 6, Used for packing tea as tea bag, sanitarian tea, Chinese herbal medicine, condiment, desiccant and so on heatseal filter ... 440g/50mmHeatseal ability 120 oC to 160 oC filter paper tea