Rob Allen Foam Blown Hard Float - 7LThe tough Polyethelene shell is blown with a high quality PU foam formulated to specific Rob Allen requirements. The blowing agent and catalyst harden the foam into a closed cell structure with greatly increased density against the shell, thus increasing crush resistance for the day the float is dragged under by a sounding fish. If increased visibility is needed a dive flag and keel weight can be fitted. **Flag and weight sold separate.