The test paper barrel and test paper cylinder are mainly made of polypropylene as the main raw material,consisting of a cover and a cylinder.Desiccants can be placed according to customer requirements,and the sealing of the test paper cylinder is also guaranteed.Up to 50 test strips/tubes can be equipped with a lid desiccant,which can be white or black(the black lid cannot be equipped with desiccant at the moment).The test tube is mainly made of polypropylene and consists of a lid and a tube.The desiccant can be placed according to customer requirements.The test tube is sealed and the lid is easy to press and open.