3M DBI/SALA 8510457 Advanced Series 21.5 Manhole Collar for use on manways 22"-24" for use with Advanced davit systems.  The UCL Advanced Manhole Collars are designed for applications involving frequent setups over similarly sized access openings.  Simply slip the collar into sewer manhole, tank hatch or other openings.  Constructed of lightweight, powder-coated aluminum for portability.  Available on request in anodized finish for additional corrosion and tank contamination resistance.  Comes with PVC sleeve liner.  Custom size and shapes available."

• Lightweight collar for portability.
• Fits 22"-24" diameter manways.
• 450 lb capacity.
• Provides mast rotation.
• Carrying handles for ease of use.
• Easy to set up. Simply drop collar into manway and then attach davit system.
• Designed for use with Advanced Series davit system.
• Weight 37.50 lbs.