Ultima F1 Mono 4oz spool. Ultima F1 has been the first choice for anglers on the UK match circuit for many years. This high performance product has been designed using the highest quality materials to deliver the perfect balance of features for the serious surf angler. High linear and knot strength combine with a soft and supple nature to cast further and more accurately; excellent abrasion resistant qualities mean that Ultima F1 will always deliver, even in the toughest conditions.