UIM classes Store / UIM classes Propellers for powerboats racing under UIM (International powerboat federation) classes. Specials Specials Featured Products OSY-400 €540 OSY-400 4 blade -50 eur SALE! F4 €840 F4 GT30 €780 GT30 GT15 €660 GT15 F125 €540 F125 F250 €564 F250 New custom sizes system! F1 and F2 €1 800 F1 and F2 R1000 €660 R1000 F500 €588 F500