Wooden Test Tube Support with Draining Pins, 6-Place Subcategory_Power Supplies providing the high-resistance leg of

providing the high-resistance leg of a voltage divider where current draw needs to stay in the microampere range

Compact linen-tester magnifier folding flat into a metal frame

Three-part color-coded human skull model differentiates bone regions and sutures for detailed cranial anatomy instruction

Five-pulley set of double-parallel 50mm plastic pulleys on open-sided steel frames

Pair of 400-turn copper coils on an adjustable base

Wooden Test Tube Support with Draining Pins, 6-Place Subcategory_Power Supplies providing the high-resistance leg ofDraining pins paired with a turned post hardwood frame give this six place test tube support inverted drying plus upright storage for tubes up to 19 mm across.