HydroStream Boat Bumper (Pack Of Two)With bigger and bigger wakes on lakes and rivers these days, there's real concern about damaging the rubrails and even the fiberglass structure of HydroStreams when tied up to docks or other structures. These purpose built bumpers protect your boat from these threats. The HydroStream boat bumper slides over the rubrail and holds itself in place. The foam compound protects your rubrail and won't scratch your gelcoat. Compatible with the following