Matchbox Kingsize K 3c K4b K5c K11a K35 Trailer Towing Eye white plastic.
A replacement reproduction Matchbox Kingsize Trailer Towing Eye injection moulded white plastic part. Suits most of the Kingsize Trailers:
Heat towing eye in hot water for 3 to 5 minutes to make pliable and gently twist or roll the pin end into the trailer tow bar socket. Slow and gentle so that the pin does not snap. It will 'pop' into place.