Designed to fit 1 1/4" OUTSIDE diameter CARDBOARD tube spring roller with a 7/8" INSIDE diameter.
Please note: Inside Diameter's of Cardboard Rollers may vary depending on the thickness of the cardboard as long as the outside diameter is 1 1/4" this is the proper end plug.
Note from the Shade Doctor: "The most common cause of "Pin Shear" is
from worn out brackets. If this is your issue, you should replace your
brackets as well."