Non-Vented Wide Mouth LDPE Squeeze Rinse Wash Bottle for Plant Watering, 500mL Subcategory_Health and Genetics Epoxy-coated steel wire test tube

Epoxy-coated steel wire test tube rack with 80 holes in an 8 by 10 layout

the simple mount steadying optics elements at bench height for refraction

and iron rods for linear-expansion comparison

this 4-inch carbon-steel needle pivots on a brass cup bearing for low-friction rotation under the local field

Hand-crank centrifuge spins two 15mL tubes with a bench-top clamp mount for teaching sedimentation and separation concepts without needing electricity

Non-Vented Wide Mouth LDPE Squeeze Rinse Wash Bottle for Plant Watering, 500mL Subcategory_Health and Genetics Epoxy-coated steel wire test tubeBuilt for plant and succulent watering, this 500mL wide mouth LDPE squeeze rinse bottle features a non vented cap for controlled directed dispensing.