Multifunctional rack for laboratory tubes (0,2, 0,5, 1,5 and 2.0 mL), fast to print

It is the design for a multifunctional rack for laboratory tubes, for several sizes: (0,2, 0,5, 1,5 and 2.0 mL). Dimensions were tested and confirmed with tubes of those sizes. It is one of the fastest designs to print (around one hour. It is composed of 5 pieces to be easily glued together and it does need any support.