This is the block to use onthe 420, FJ and V15 for the Jib halyard at the hounds of your mast. 25 mm Max Wire 3 mm Lightweight High working load Ferrule Top Removable Sheave Flared Cheeks to Minimize Chafing RF468Regular price: $25.00Sale price: $19.99 WE SHIP WORLDWIDE! Due to the wide variety of the size and weight of our items we will charge the actual cost of shipping in a separate charge on all orders.You may email us for a shipping cost estimate. Send us email intensitysails(at sign)mac.com