UIM classes Store / UIM classes Propellers for powerboats racing under UIM (International powerboat federation) classes. Specials Specials Featured Products OSY-400 €549 OSY-400 4 blade -50 eur SALE! F4 €854 F4 GT30 €793 GT30 GT15 €671 GT15 F125 €549 F125 F250 €573.40 F250 New custom sizes system! F1 and F2 €1 830 F1 and F2 R1000 €671 R1000 F500 €597.80 F500