Click to expand Tap to zoom Aluminum Thru Hull Connector - 1/2” Waterline by Riva Yamaha Motorsports Save Liquid error (product-badge line 32): Computation results in '-Infinity'% $28.95 SKU RY1013-TH-1/2 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Aluminum thru-hull connectors allows secure waterline routing through transom or bulkhead.