3M DBI/SALA 8518509 Advanced Series 21" Working Length Lower Mast/Extension for use with Advanced Series upper masts and bases.  UCL Safety Systems 21" working length lower mast/extensions are for use with UCL Advanced Series davits.  Combine up to two lower mast extensions to increase the anchorage height.  Custom lengths from 12" to 60" can be ordered.  All masts are made of mild steel and powder-coated for a strong durable finish."

• 21 inch working length.
• 450 lb capacity.
• Can combine up to two lower masts to increase anchorage height.
• For use with Advanced Series upper masts and portable or fixed bases.
• Constructed from mild steel and powder-coated for durable finish.
• No tools required for easy addition to davit system.
• Weight 15 lbs.