A reel assembly includes two flanges with an expanded polystyrene core therebetween. Two fastener members inserted from opposite sides of the flanges project through the flanges and core and lock with each other. The fasteners are hermaphroditic in nature, each fastener member having a male and a female latching member. When the latching members are inserted into the flanges diametrically opposed position with respect to each other, the respective male and female latching members lock between themselves the flanges and the core.