12-Tube Wooden Test Tube Rack, 9" Wide, for 20mm Tubes Physics_Heat & Thermodynamics these concavity microscope slides hold

these concavity microscope slides hold liquid samples for hanging-drop preparations and observation of specimens in suspension

Double-walled in aluminum to minimize heat exchange with the surrounding air

Hand-painted arterial red and venous blue vessels trace the full systemic and pulmonary circulation across a mounted human figure for cardiovascular teaching

Sequential mitosis stages — prophase

and a motor accessory

12-Tube Wooden Test Tube Rack, 9" Wide, for 20mm Tubes Physics_Heat & Thermodynamics these concavity microscope slides holdBeech wood test tube rack holds 12 tubes up to 20mm diameter in a 9 inch frame for organized storage during chemistry and biology experiments.