Storage Box with Lid for 15mL Centrifuge Tubes, 36-Place (6x6), PP, Blue Base & Clear Lid, 4 Boxes/Carton-3058 The durable, economical & space saving polypropylene storage boxes for 15 & 50mL centrifuge tubes can be used for any type of storage. Size(L x W x H): 12.5 x 11 x 7.25