Impact resistant

The oval inner diameter allows the maximum fore/aft play and minimum side play

self-cleaning bearings

Smart Aqua Epoxy Putty

wood and primed underwater metals (except aluminum) * Quick drying

Exhaust Waterlocks various sizes Harken CARBO AIR BLOCKS 57 MM Impact resistantHeavy duty black polypropylene construction suitable for wet exhaust systems only. These waterlocks prevent water from flowing back to the engine and they reduce exhaust noise. They have the facility for either top or side entry by cutting the desired port. Colour coded. Red Suits 38mm (1 1 2") hose Black Suits 44mm (1 3 4") hose Blue Suits 50mm (2") hose