... not broken package, dropped calls during immersion and can retain the original aroma, color and taste.2.High sanitation standards. Various of ... ,103mm,114mm,125mm,140mm,etc2.Basic weight:16.5gsm,18gsm,21gsm,22gsm,23gsm,25gsm,28gsm,etc3.Outer diameter: 450mm, inner size:76mm ... interested in our products,welcome to get samples from us and visit our factory! heat seal tea bag filter paper