YKK Window Sash Bead 9mm Opening, Glass Thickness 5mm (K-20358) 128m

YKKAP Window Sash Parts Glass Bead Rubber Packing Roll: For 9mm Opening / 5mm Glass Thickness (K-20358) 150m
Color: White / Grechan

This is a glass bead (packing) that is wrapped around the perimeter of window glass.
This is the remainder after using a 150m roll for 4 large sliding windows, so there should be about 128m remaining.