The 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race and has a 250 lb (113 kg) maximum working load. The 404 uses an O-ring to keep the line in the sheave during intermittent loading.
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![Harken 16mm Block [404]](http://www.essentialmarineservices.com/cdn/shop/files/79053XL.jpg?v=1702457367&width=1445)