Gennaker Halyard Thrue Blocks Interested in this product? Email us Description M32 Gennaker halyard thrue blocks. Sold in pairs. For the Mast. Additional Information SKU: 323425 - Need Help? Contact Us Leave Feedback Contact Us Leave Feedback Your Name (required) Your Email (required) Subject Your Message Share Related Products Hock Halyard Lock FSE Robline Admiral 7000 8mm Diamond Stay Upper, 6018 mm Locking Ring 20Mm, Two-Turn