The normal tension roll paper spindle handles both 2-inch and 3-inch paper cores and is used for the majority of Epson media.
The optional hi-tension roll paper spindle handles both 2-inch and 3-inch paper cores and is designed to be used with the following Epson media;
Ultrasmooth Fine Art Paper, Epson Textured Fine Art Paper, Epson Watercolor Paper-Radiant White, Enhanced Synthetic Paper and Enhance Adhesive Synthetic Paper.