Fraction-collector-plate style rack holds 1.5 to 2.0mL microtubes in a 5 x 16 array. Tubes sit in large wells with conical bottoms. Polypropylene rack is ideal for freezer storage. Autoclavable. Available in natural, blue, green, pink, yellow, orange, or assorted colors (one of each). Rack measures 8-7/8 x 2-5/8 x 1-1/8". Packs of 5.