BirdBrain - Rubber stopper and tube assembly

Rubber stopper and tube assembly by BirdBrain

At the narrowest part this tube is ¾" and expands to 1"
Tube is plastic.

BirdBrain - Rubber stopper and tube assembly

Since BirdBrain products are handmade, often times there are variations in color and texture, sometimes these difference can be significant.  These variations give handmade products uniqueness and character.