I've used about 5 of them. I bought them on Amazon. It seems there are 100 in a pack, but I didn't count how many were in the package when it arrived, so I don't know the exact number remaining. uxcell Silicone Rubber Band Rings Anti-Slip for Wire Cord Cable Wrapping Bundling, Diameter 10 mm, Thickness 1 mm, Width 5 mm, 100 Pieces