this brackett polyurethane air filter element has been designed to provide maximum dust collecting efficiency, non-restrictive air flow, and economical element replacement, while maintaining alightweight filter. the element has been treated with a distinctive treatment called a wetted agent and is approximately 98% efficient. the wetted agent is an accompaniment in the efficient capturingof dust. in addition, the element has received a fire retardant treatment. for the above reasons, replace the element each 200 hours of use/12 months or when 50% covered with foreign material. do notwash and reuse. note: the expected shelf life of brackett elements stored in their original packaging and out of direct sunlight is as follows: 4 years from date of manufacturelisted on the front of the element packaging (ex: mfg month/year). this allows the element to be installed on an aircraft at the end of its shelf life. 请告诉我们您采购产品的型号，谢谢！

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上海皇雀实业有限公司
陈小姐
13296177584
上海市国定东路200号3-4号楼208室