Round-holed Stackable, autoclavable White, polypropylene rack takes 72 centrifuge tubes in 6 rows of 12. Molded cutouts in end panels form handles. 2591C58 and C60 hold 400-500 µL tubes and are 9” L x 4 3/8” W x 4 3/8” H. 2591C62 and C64 hold 1.5 mL tubes and are 8 3/8” L x 4 3/8” W x 4 3/8” H.