Suitable for many Ifor Williams trailers and horse boxes. HBE506 Heavy Duty Cover for Ifor Williams HBE-506 Horse box Trailer Hitch. Stronghold hitch lock for Knott Avonride hitches fits most 50mm Avonride cast heads from 1400Kg - 3500Kg including: 575003, 575004, 575005, 575008.
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