UL 555/555S 1.5 HR./CLASS I,II & III, V-GROOVE & AEROFOIL BLADE, UPTO 4,000 FPM AND 8" W.G. MAX, OPTIONAL SLEEVE

UL 555/555S 3 HR./CLASS I, AIRFOIL BLADE, 4,000 FPM AND 8" W.G. MAX, OPTIONAL SLEEVE