Abstract: Spacers for supporting an arcuate saddle in concentric relation with respect to each of three specifically different sizes of pipe wherein a plurality of spacers are connected to the saddle and disposed radially between the saddle and one of the pipes, each spacer being a spacer having a width, length and height corresponding exactly to the three incremental spaces which are to be provided between the saddle and the three specifically different sizes of pipe, respectively, in order to achieve concentricity, all of the spacers being connectible to the saddle in a first orientation where the width dimension of the spacers is disposed radially between the saddle and a first size of pipe, all of the spacers being connectible to the saddle in a second orientation where the length dimension of the spacers is disposed radially between the saddle and a second size of pipe, all of the spacers being connectible to the saddle in a third orientation where the height dimension of the spacers is disposed radially between t