These double riser sections are identical to the ones that come with the master C-stands with turtle base. C-stands get their sizing from the length of their riser sections. The 30” double riser for instance, has two (double riser) telescoping risers and one main section for a total of 90”. Add the height of the base and you arrive at your maximum height, 2 risers, 3 sections (dia.: 35mm, 30mm, 25mm)
-Has An industry Standard Junior Baseof 28mm (or 1 1/8")andon Top it Has a 16mm (5/8") Babyspigot.
-Can be Used as An Up Right on a Set of C-Stand Roller Wheels or as An Extention for Large Stands with a 28mm Junior Receiver .