Brand 21-Tube White PP Test Tube Rack 4340040

- Accommodates 21 tubes on 3 x 7 tube position format with a diameter of up to 30 mm
- Polypropylene rack snaps together for easy assembly, sturdy construction, stackable, and is available in four colors
- Will not float in water bath; alphanumerical positions for clear sample identification
- Wide spaces between positions; operating temperature -20 to 90°C; autoclavable at 121°C
- Comes in 5 pcs per pack