Roomba i3/i5/i7 Brush Holder

This is a small, plastic part that replaces the plastic holder on the end of a Roomba's main rubber brushes. 

After a brush has been used for some time, hair can tangle around the ends of the brush and the friction/heat causes the plastic piece to break off of the brush, either falling out and getting lost or just not holding the brush in place properly anymore. This part replaces the broken piece, allowing the brush to continue working until it needs replacement due to tread wear.