How do you measure a filter bag?

The specifications of the dust removal filter bag are marked with the diameter of the skeleton, the diameter of the flower board, and the diameter of the filter bag; For example, the filter bag sample can be flattened to measure the length of the filter bag and the diameter of the mouth ring. It is recommended to measure the diameter of the skeleton in detail when purchasing the cloth bag, so that the manufacturer of the cloth bag can know the size; If the size is not correct, the use effect of the dust collector and the service life of the cloth bag will be affected!