The sprit system is a crucial part of your Optimist mainsail set up. Complete with Viadana blocks and Kingfisher Evo Race 78 spliced Dyneema ropes to give you the edge.
Viadana Optimist sprit block
Viadana INOX 25mm single ball bearing block
Kingfisher Evo Race 78 spliced 4mm Dyneema ropes