• Heavy duty polypropylene rack.• Each unit measures 4.25 x 4.45 x 4.45 in (10.8 x 11.3 x 11.3 cm)• Each unit will hold:• Side One: Wells 4, Well Dia 30mm, 50 mL tubes• Side Two: Wells 10, Well Dia. 17mm, 15 mL tubes• Side Three: Wells 12, Well Dia. 12.5mm, 3 – 7 mL tubes• Side Four: Wells 16, Well Dia. 11.5mm, 1.5/2.0 mL tubes• Autoclavable• 5/pkg