Abstract: The reel includes two flanges and a hub. The hub has flexible latching blades extending tangentially inside housings, with alternate blades extending in opposite directions. The hub also includes locking bars in the housings for co-operating with hooks on the flanges. The locking bars are directed in two opposite directions with the bars extending in one direction co-operating with the hooks on one of the flanges, and the bars extending in the opposite direction co-operating with the oppositely-directed hooks on the other flange.