Autoclavable polypropylene (PP) • Heavy-duty construction is durable and chemical resistant • Multiple colors available for benchtop organization at a glance • Versatile design accommodates different tube sizes on each side • The four sides hold the following tubes: Eight ‚Äì 50mL or 30mm diameter tubes, Twenty ‚Äì 20mm diameter tubes, Twenty four ‚Äì 15mL or 17mm diameter tubes, Forty ‚Äì 12mm diameter tubes. Dimensions (L x W x H): 200 x 100 x 96mm (8" x 4" x 3.8")