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 Halyard Sheave Mast 57 mm T2 Soft-Attach Block Plate Forestay Terminal Diamond Stay Lower, 6174 mm