The TX25/15/10-3C94 from Ferroxcube is an epoxy-coated 3C94 ferrite toroid core with a length of 25.95 mm (1.007") and a diameter of 10.90 mm (0.429").
The TX25/15/10-3E27 from Ferroxcube is an epoxy-coated 3E27 ferrite core of toroid type, with a length of 25.95 mm (1.007") and a diameter of 10.90 mm (0.429").