Jumbo J12074100 Frame with 4 rungs, one meter high. Jumbo supplies scaffold side frames which are one meter high, with four rungs; or two meters high, with eight rungs. Two of the one meter sides could replace a single two meter side, thus giving the user the chance to raise the height , in sets of two meters. However, there are times when the user only requires a one meter extension. This is where item J12074100 could be placed on each of the sides, resulting in a one meter extension.