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Upright Lead Blocks Upright lead blocks are a low-profile solution for leading halyards, rig controls or sail controls back to cleats or jammers. Click on the product thumbnails below for more details
Ronstan "Core" Blocks - 60 & 75mm
Ronstan All-Purpose Double Block - 50mm
Ronstan "Orbit Block" Stand-Up Bases
Carbo Racing Foil - Unit 2 System