Spring-Loaded Projectile Launcher Kit with Paper Tape Subcategory_Erlenmeyer Flasks Pairs 75mm of aperture with

Pairs 75mm of aperture with a 200mm diverging focal length on a double-concave glass lens

providing a quick swap-in reference for general-purpose AC-circuit and timing-experiment work

High Quality Borosilicate glass

Colloidal ferrofluid of sub-10nm magnetic nanoparticles in a 50mL bottle that forms peaked spike patterns in a magnetic field

this metal-cased spectroscope pairs a 600 lines/mm holographic replica grating with sample vials and mount

Spring-Loaded Projectile Launcher Kit with Paper Tape Subcategory_Erlenmeyer Flasks Pairs 75mm of aperture withSpring loaded projectile launcher kit in aluminum with steel latches, firing from 2 to 10 feet across adjustable launch angles and compressions, shipped with a paper tape measure for range work.