Polypropylene Test Tube Rack for 40 x 20mm Tubes Subcategory_Dropping Funnels paired with the 750mm black

paired with the 750mm black lead to keep wiring color-coded across mid-distance bench setups

and an 18mm attachment diameter for pulling small weights in mechanical-advantage experiments

Greatly enlarged pituitary-hypothalamus complex exposes the anterior and posterior lobes with connecting infundibulum for endocrine anatomy and physiology teaching

Round convex glass mirror for physics optics experiments in reflection

5-inch height including the hook

Polypropylene Test Tube Rack for 40 x 20mm Tubes Subcategory_Dropping Funnels paired with the 750mm blackSnap together polypropylene test tube rack holding 40 tubes up to 20 mm across a 9. 75 inch length, shipping flat and disassembling for easy cleaning between uses.