The PQ50/30-3C97 from Ferroxcube is an uncoated 3C97 ferrite core of PQ type, set of 2 pieces, measuring 2.008" (51.00 mm) in length, 1.260" (32.00 mm) in width and 1.181" (30.00 mm) in diameter.
The PQ50/30-3C96 from Ferroxcube is an uncoated 3C96 PQ ferrite core sold as a 2-piece set, with 2.008" (51.00 mm) length, 1.260" (32.00 mm) width and 1.181" (30.00 mm) height.
The PQ50/30-3F4 from Ferroxcube is a 2-piece set of uncoated 3F4 ferrite PQ cores measuring 2.008" (51.00 mm) in length, 1.260" (32.00 mm) in width and 1.181" (30.00 mm) in height.
The PQ50/30-3F36 from Ferroxcube is a 2-piece set of uncoated 3F36 PQ ferrite cores, 2.008" (51.00 mm) long, 1.260" (32.00 mm) wide and 1.181" (30.00 mm) high.