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

Because if your compass doesn’t know where you’re heading

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

BlockType: cheek

Comfort Handle Clasp

Exhaust Waterlocks various sizes Harken CARBO AIR BLOCKS 57 MM The oval inner diameter allowsHeavy 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