This is a set of 6 cardboard wrap cores. The types are mixed, but they are all cores from 30cm x 50m wrap. Although the thickness may vary slightly, they are all very hard and sturdy. Please check the images. Size (cm) Length: Approximately 30.7 Diameter: Approximately 3.4 Please understand that there may be slight variations. If anyone is interested in using these, please understand that they have been stored at home. Please note that we will ship them in simple packaging, only putting them in an envelope after taking measures to prevent water damage, without using cushioning material. Great for: Materials for handicrafts and crafts... Use in caregiving situations... Use during rehabilitation... Also useful for myofascial release.