The Fly 25 mm block, reference 1250.ILCA, is the upper unit of the vang system specifically designed for ILCA boats. It features a high-performance aluminium Fly block with a 25 mm sheave and a maximum working load of 275 kg (606 lb). Optimized for the complete 1253.ILCA vang system, it ensures perfect integration and efficient operation. A custom pin and clevis system keeps the block securely in place inside the boom, even when the vang is not under load.