Kenner Products Company: Our building sets and spare parts are compatible with the original sets manufactured by Kenner Products Company, based in Cincinnati, Ohio, from 1957 until the early 1970s.
Irwin Toys: A Canadian company named Irwin Toys also manufactured Girder & Panel building sets for a short time. The parts in the sets manufactured by Irwin Toys are dimensionally different from the original Kenner sets and therefore, our parts do not fit the sets manufactured by Irwin Toys.
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