low price item!!! Please buy over S$19.9 storewide ，
single order will not process， thanks for your understanding!!

Name: 3 # filter box antivirus valid time: 45 min protective objects: benzene and benzene homologues， gasoline， acetone and aniline， carbon disulfide， carbon tetrachloride， methyl bromide， methyl chloride， ether， chloroform， chloropicrin organic gas such as conditions of use: not less than 18% oxygen concentration in the air， the harmful gas concentration less than 1%

Name: 4 # filter box antivirus valid time: 25 min protective objects: ammonia， hydrogen sulfide using conditions: no less than 18% oxygen concentration in the air， the harmful gas concentration less than 1%

Name: 7 # filter box antivirus valid time: 30 min protective objects: chlorine， sulfur dioxide， nitrogen oxide， hydrogen sulphide， phosgene， phosphorus and chlorine acid gas such as organic pesticide use conditions: no less than 18% oxygen concentration in the air， the harmful gas concentration less than 1%