20 Metal Alloy Specimen Set in Die-Cut Case Lab Equipment_Water Stills Pack of 10 rubber stoppers

Pack of 10 rubber stoppers features single hole with 27 x 31 x 32mm dimensions for tubing pass-through and laboratory vessel sealing

Rod-mounted full-size skeleton pairs bare bone on one side with painted muscle origins and insertions on the other for skeletal and myology teaching

Materials for five demonstrations for hands-on learning

Dense lead-flint glass prism at 28mm with refractive index 1

Plug-type resistance box with constantan-wire coils between split brass contact blocks

20 Metal Alloy Specimen Set in Die-Cut Case Lab Equipment_Water Stills Pack of 10 rubber stoppersTwenty specimen metal alloy collection supplied in a die cut case with each sample individually labeled, sized for materials science comparison of composition and properties.