1000mm Red 4mm Double-Sided Connecting Lead Gifts_Science Gifts Used as a sensitive direction-finder

Used as a sensitive direction-finder when paired with a tangent-compass stand

the 90-45-45-degree faces redirecting wider beams for total internal reflection and image-inversion work

and protein separation across three selectable ranges (0-50V

revealing cranial sutures

the 27-part life-size dual-sex torso opens at the back to expose spinal cord alongside visceral and reproductive anatomy

1000mm Red 4mm Double-Sided Connecting Lead Gifts_Science Gifts Used as a sensitive direction-finderOne meter red insulated lead with 4mm banana plugs and 16mm metal terminal tips, completing the positive rail half of the long haul plug to plug patch wire pair.