3M DBI-SALA 8518004 Confined Space Lower Mast Extension inspection device 2" NPT - Fits your

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3M DBI-SALA 8518004 Confined Space Lower Mast Extension inspection device 2" NPT - Fits your3M DBI SALA 8518004 Confined Space Lower Mast Extension 57 in. (144. 8 cm) lower davit mast extension for use with upper davit mast. Confined space lower mast extensions are designed for use with our 8518001 and 8518006 offset davit masts. The extensions provide the flexibility to change the overall mast height of your system in the field. For added versatility, you can customize either one of these davit masts with up to two lower mast extensions, 90