Cast-in collar accessory
Sure Snap collar extensions
Stackable 50 mm rings that raise a Sure Snap cast-in fire collar to suit slabs deeper than 250 mm. Available for every collar size, H65S, H110S and H150S, and cast in as part of the collar’s certified system.


Collar extensions
What they are and when to use them
Specifications
Extension specifications
| Stock codes | SELFC-65EXT, SELFC-110EXT, SELFC-150EXT |
| Height | 50 mm per ring (stackable) |
| Use | Slabs deeper than 250 mm |
| H110S extension inner Ø | 131 mm |
| H110S extension outer Ø | 145 mm |
| Material | Polypropylene |
| Fits | H65S, H110S and H150S collars |
| Cast in | With the collar, before the pour |
| Certification | Covered by the collar’s LPCB 1833a |
Compatibility
Matched to the collar’s certified system
Extensions are part of the collar’s certified cast-in system and carry the collar’s LPCB certification (1833a). Match the extension to the collar size, then cast it in as part of the assembly.
Compatible collars
Documentation
Compliance and downloads
Extensions are covered by the collar’s LPCB approval (1833a).
Drawings, Revit families and CAD files for every extension size.























