Center hollows fits PVC 3/4"ID electrical conduit (1.05"OD). Cautious buyers may want to pick up one of the smaller collets available separately to confirm the kit will fit your size needs.
Material thickness .04". For best life, fill parts with expanding foam or better filler material.
Just a heads up to those interested, I'm in the process of resizing this to work with a 1"ID PVC
*All trademarks including "Star Wars" and "Emperor's Shadow Guard" belong to LFL. This is a not-for-profit printable model for use as component parts for costumers and makers.