9" Outer Dia", polycarbonate lexan

Clamps to the outer diameter of a core chuck or shaft. It will prevent the web from wandering and telescoping. Easily removed or positioned with a turn of the handle. As shown, can be infinitely positioned on non-expanding / non-gripping area. Optionally, bore can be relieved to accomodate lugs, buttons, grippers etc. Contact factory with details.