SUMMIT COLLARS
#25 Roller Chain Sprocket B Type 1/4'' Bore 10 Tooth 25B10H-1/4
A nice touch is that Belzona comes with clear technical support from the manufacturer.
#40 Roller Chain Sprocket B Type 3/4" Bore Hardened 10 Tooth 40B10H-3/4
I like that the side handle assy has a low profile so it doesn't snag on things.