Plastic Stand for Magnetic Needle, 4.5" Tall Chemical_Sodium Iodide sized for the longest reach

sized for the longest reach in the patch-wire family for cross-bench wiring of complex student circuits

and echinoderm internal anatomy for marine invertebrate teaching

Wider 150 mm throat on this drop-forged steel G-clamp grips thicker bench tops and apparatus frames during larger classroom demonstration setups and workshop assembly

5 mm in diameter

5 by 4-inch ventilation apparatus modeling historic mine-gallery airflow and domestic chimney convection through a candle-driven hot-air-rise demonstration

Plastic Stand for Magnetic Needle, 4.5" Tall Chemical_Sodium Iodide sized for the longest reachTall 4. 5 inch non magnetic plastic pillar on a 0. 7 inch base with a carbon steel pivot point, raising a magnetic needle high enough for back of room visibility during compass demos.