UIM classes Store / UIM classes Propellers for powerboats racing under UIM (International powerboat federation) classes. Specials Specials Featured Products OSY-400 €400 OSY-400 4 blade -50 eur SALE! F4 €650 F4 GT30 €600 GT30 GT15 €500 GT15 F125 €400 F125 F250 €400 F250 New custom sizes system! F1 and F2 €1 500 F1 and F2 R1000 €500 R1000 F500 €400 F500