The filtration efficiency of bacteria should be ≥ 95%.
17.5 cm x 9.5 cm - 3P
Product Performance: The breaking strength of the connection point between each mask belt and the mask body should not be less than 10N. The filtration efficacy of bacteria should be ≥ 95%. The simultaneous resistance of gas exchange between two sides of the mask should not be greater than 49pa/cm².