[- stainless steel] made of materials that are
[40 holes of different diameters] Each rack is designed to meet various needs for test tubes and colorimetric tubes
[Professional manufacturing] Exquisite force switch ensures longevity and convenient for laboratory experiments and speech for chemical tests during chemical tests for chemical tests for non-trading purposes] Such as maintenance of pens or brushes.
[Multifunctional Design] Practical and beautiful rack that meets laboratory functionality and daily needs

Spec:
The features:
are made of stainless steel, this test tube rack is and and. Use.
Ability to suspend test tubes or colorimetric tubes during chemical experiments and drying tubes.
Can also be used for non-traditional purposes, such as pen holders, brush holders, etc.

Specification:
Condition: Brand New
Material: stainless steel.
Type: 15.5mm, 18.5mm, 20.5mm (Optional)
Instructions:
15.5mm to fix standard test tubes from 15mm to 16mm
18.5mm to fix test tubes from 17mm to 18mm
20.5mm to repair test tubes from 20mm to 21mm
Weight:
15.5 mm: approx. 401g/14.1oz.
18.5 mm: approx. 488 g / 17.2 oz.
20.5 mm: approx. 520 g/18.3 oz.
Diameter:
15.5 mm: approx. 15.5 mm/0.6 inches.
18.5 mm: approx. 18.5 mm/0.7 inches.
20.5 mm: approx. 20.5 mm/0.8 inches.

Package list:
1 x Test Tube Holder
Note: