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.
|Name||Kupo - 30" C Stand Double Riser Section|