3M DBI SALA Galvanised Flush Core Insert Mount HC Davit Base 8000089For a core insert base (galvanised steel) designed for use with 3M DBI SALA HC Davit Masts in the formation of confined space rescue and work support systems, use 3M DBI SALA Confined Space HC (High Capacity) Core Insert Base. The core insert base is constructed of mild steel and coated using a hot dipped galvanisation process, which provides corrosion protection against the elements and is silver in appearance. It's designed to be installed flush