Ropeye® Stick-On Blocks are designed as a way to install blocks without the need to drill holes for installation. The H18 features a 40 mm pad and a Harken 18 mm Fly block.
Need help to design your Harken system - take a look here for the Harken System Guides and Drawings
Or perhaps you need some other information (load calculators, block selectors, service instructions or manuals)? Take a look here for all the official Harken Support Information