1,High efficiency, 2,large dust holding capacity 3,Strong supply capacity. 4,High pressure stability. 5,High efficiency ModelOrginal P/NDHdd1d2FY ModelUPS2254672654/B942121-12UNF62720261280694ML22,30S,ML3739907175942121-12UNF62720261280694M37,M22,50S42888198942121-12UNF62750261280693M553991163111828313/4-12UNF7488026838161875S42843797135200M38*1.51001100260081635150S42843805135302M38*1. ...