Organize a large number of microtubes easily on the benchtop. Accommodates up to eight 80-well microtube racks with either 1.5 or 2.0mL microtubes in the racks. Sturdy acrylic construction. Plenty of room to slide the racks in and out. Vertical rack measures 6-1/4 x 9-1/4 x 8-7/8"(L x W x H). Horizontal rack measures 12-1/4 x 9-1/4 x 4-7/8"(L x W x H).