The Zircon 29/18 mm twisted fiddle block, reference 1251, is the central unit of the ILCA vang system, designed to provide precise alignment and reduced friction. Its 45° twisted configuration keeps the sheaves aligned under load, prevents line chafe, and improves the overall efficiency of the vang system. Optimized for the complete 1253.ILCA vang system, it enables smoother adjustments and better sail control. Compact and lightweight, it is suitable for lines up to 5 mm, with a 29 mm sheave.