Ferrite Toroid, Mix 43, Fair-rite p/n 2643251002

39mm (1.5") OD,  16.75mm (0.66") ID,  22mm (0.875") H

Weight: 104g

Increasingly popular for HF EFHW matching as a substitute for the FT-240-43.   The comparatively larger cross sectional area and shorter path length appear to provide an advantage.