Coffee ventilation valve, an exhaust valve dedicated beans, coffee-way exhaust valve, fermentation ..

Coffee ventilation valve, an exhaust valve dedicated beans, coffee-way exhaust valve, an exhaust valve fermented feed bags, food packaging, special exhaust valve. 100% food grade PE raw material production, environmental certification by SGS. Mainly used coffee bags, fermented feed bags, pet food bags, breathing film bags, plastic bags and a series of raw compound bag.