80 pieces, a bulk sale. Diameter: Approximately 3 cm (inner diameter approximately 26mm) Length: Approximately 45.5 cm These are for commercial use, so they are sturdy. You could probably make shelves or chairs with these. Instant purchase and silent purchase are welcome! There is another set of the same item. If you buy two sets, it will be 3800 yen. (As of November 29th) #Gymnastics #Events #Recreation #Commercial Wrap Cores