could be the same chemical formula of the 1 i used? i have seen manufacturers assigning different id numbers to the same product depending of the presentation. same product but in several sizes.
and the 1 i used has different p/n for the u s and for canada. you can see both 1 behind the other. same tubing.
see: https://www.permatex.com/products/ga...asket-maker-3/
go figure.