Linen Tester Magnifier with Foldable Metal Frame, 5x Subcategory_Force and Motion Stand-mounted force pump illustrating positive-displacement

Stand-mounted force pump illustrating positive-displacement fluid transfer against gravity

the standard configuration for keeping the field intact between classroom magnetism sessions

this universal holder mounts on a low-friction slider for quick repositioning during experiments

rubber stopper

panel-mounted with 4mm sockets and an enclosed earth pin for safe wiring during induction and AC ratio demos

Linen Tester Magnifier with Foldable Metal Frame, 5x Subcategory_Force and Motion Stand-mounted force pump illustrating positive-displacementFolds flat into a metal pocket frame and opens into a 5x linen tester with an integrated measurement scale, distortion free for textile thread counts and fine pattern inspection.