Centrifuge Tube Rack Earth Worm Model and using the proof plane

and using the proof plane to investigate the distribution of charges on conductors

hole for screwing the compass on the stand

visual for studying the structure of permanent magnet moving coil instrument in teaching

3D Global Model Showing Earth Internal Structure

2 x 2" X 4

Centrifuge Tube Rack Earth Worm Model and using the proof planeEasy to disassemble and install, the threelayer design is convenient for the insertion and removal of the tube and is easy to carry. Easy to clean, using ABS material, can be cleaned with water, very convenient for your use. Easy to store, the test tube rack has 3 separate parts, which need to be assembled and take up little space. The capacity is large, the grid size is about 30x30mm, and it can hold 21 test tubes. Premium Quality: This item is made